Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 16 de 16
Filtrar
1.
Retina ; 41(9): 1901-1910, 2021 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-33411472

RESUMEN

PURPOSE: To determine the incidence of complete resolution of choroidal neovascular membrane-associated exudation with a single antivascular endothelial growth factor injection in treatment-naive wet age-related macular degeneration patients and its associated characteristics. METHODS: Retrospective, observational study of naive wet age-related macular degeneration patients who received antivascular endothelial growth factor therapy with ranibizumab/aflibercept and demonstrated complete resolution of retinal exudation with a single injection. Complete resolution was defined as the total disappearance of the intraretinal fluid, cysts, and subretinal fluid and a return of retinal thickness to <250 µm on spectral-domain optical coherence tomography. All relevant data were collected. Follow-up was scheduled on Days 1, 7, and 30 postoperatively and then monthly, with at least 9 visits mandatory per year if the macula remained fluid free. Appropriate statistical analyses were performed. RESULTS: Sixty-three patients (29 men; mean age 67.25 ± 4.40 years) were identified. The mean baseline and final-corrected distance visual acuity was 20/160 and 20/45, respectively. Patients completed a mean of 10.9 follow-up visits per year. Smaller choroidal neovascular membranes (<200 µm), early presentation, better presenting corrected distance visual acuity, subfoveal choroidal neovascular membranes, absence of blood/fibrosis, and use of aflibercept (2 mg) favored resolution with one injection. CONCLUSION: A subset (13.76%; 63/458, 95% confidence intervals: 10.73-17.25) of patients with treatment-naive wet age-related macular degeneration demonstrates resolution of choroidal neovascular membrane-associated exudation with a single antivascular endothelial growth factor injection, sustained over 2 years or more. This can lower therapy costs, treatments, office visits, and the potential risk of geographic atrophy.


Asunto(s)
Mácula Lútea/diagnóstico por imagen , Ranibizumab/administración & dosificación , Receptores de Factores de Crecimiento Endotelial Vascular/administración & dosificación , Proteínas Recombinantes de Fusión/administración & dosificación , Agudeza Visual , Degeneración Macular Húmeda/tratamiento farmacológico , Anciano , Inhibidores de la Angiogénesis/administración & dosificación , Relación Dosis-Respuesta a Droga , Angiografía con Fluoresceína/métodos , Humanos , Inyecciones Intravítreas , Persona de Mediana Edad , Estudios Retrospectivos , Tomografía de Coherencia Óptica/métodos , Resultado del Tratamiento , Factor A de Crecimiento Endotelial Vascular/antagonistas & inhibidores , Degeneración Macular Húmeda/diagnóstico
2.
J Refract Surg ; 40(5): e304-e312, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38717085

RESUMEN

PURPOSE: To compare intraoperative performance and early postoperative outcomes following phacoemulsification with two systems using active fluidics and one using gravity-based fluidics. METHODS: In this prospective randomized trial, 200 eyes were randomized to the traditional and Active Sentry groups (n = 80 eyes each) where the Centurion Vision System was used with traditional or Active Sentry (Alcon Laboratories, Inc) hand-pieces, respectively, or the Infinit group (n = 40 eyes) where the Infiniti Vision System (Alcon Laboratories, Inc) was used. Within the traditional and Active Sentry groups, there were two subgroups with low (30 mm Hg) or high (55 mm Hg) intraocular pressure (IOP) used. Outcome measures compared were: cumulative dissipated energy (CDE), percentage change in central corneal thickness (CCT) at 1 day, 1 week, and 1 month, anterior chamber cells at 1 day and 1 week, rate of rise and fall of IOP following occlusion break, corneal endothelial cell density (ECD), and macular thickness 6 months postoperatively. RESULTS: CDE was significantly lower in group II compared to the traditional group (2.96 ± 1.4 vs 4.14 ± 2.2, P = .001). With 30 mm Hg IOP, the Active Sentry group had significantly less percentage change in CCT at 1 week postoperatively compared to the traditional handpiece group (0.01% vs 0.02%, P = .008). Incidence of anterior chamber cells less than grade 2 on day 1 was significantly higher in the Active Sentry group (82.9% vs 52%, P = .03). Percentage change in ECD was significantly lower in the Active Sentry group (-0.957 vs -0.98%, P = .005). Significantly faster rise of IOP to baseline following occlusion break was seen in the Active Sentry group. CONCLUSIONS: The use of Active Sentry handpiece was associated with lower CDE, less postoperative increase in CCT, fewer anterior chamber cells, and faster rise of IOP following occlusion break. [J Refract Surg. 2024;40(5):e304-e312.].


Asunto(s)
Presión Intraocular , Implantación de Lentes Intraoculares , Facoemulsificación , Agudeza Visual , Humanos , Estudios Prospectivos , Presión Intraocular/fisiología , Masculino , Femenino , Anciano , Agudeza Visual/fisiología , Persona de Mediana Edad , Endotelio Corneal/patología , Recuento de Células , Periodo Posoperatorio , Tomografía de Coherencia Óptica , Hidrodinámica , Cámara Anterior , Periodo Intraoperatorio
3.
Artículo en Inglés | MEDLINE | ID: mdl-38595138

RESUMEN

PURPOSE: To compare visual outcomes and patient satisfaction following bilateral implantation of a non-diffractive extended vision intraocular lens(IOL) when targeting emmetropia versus mini-monovision. SETTING: Iladevi Cataract & IOL Research Centre,India. DESIGN: Prospective,randomized controlled trial. METHODS: Patients undergoing bilateral cataract surgery with an extended vision IOL(Vivity, Alcon Laboratories, USA) randomized to: group I- IOL implantation with emmetropic target in both eyes, or group II- IOL implantation with mini-monovision of -0.5 diopters(D). Outcome measures evaluated 6 months postoperatively were: unaided and corrected near visual acuity(UNVA, CNVA) at 40 centimeters(cm), unaided and corrected distance(UDVA, CDVA) and intermediate (UIVA, CIVA) visual acuity at 66cm. Mesopic contrast sensitivity, binocular defocus curve, patient reported spectacle independence questionnaire and satisfaction on the McAlinden questionnaire were also assessed. RESULTS: 70 patients enrolled in study. 34 and 33 patients in groups I and II completed follow-up. Binocular UNVA was significantly better in group II (0.26+0.05 vs 0.22+0.08 LogMAR, P=0.03). Reading add required in group II was significantly lower. UIVA (0.09+0.06 vs 0.07+0.08 LogMAR, P=0.15) and UDVA (0.02+0.04 vs 0.02+0.05 LogMAR, P=0.78) were not significantly different between groups. Mesopic contrast sensitivity was not significantly different between the groups. Binocular defocus curve showed significantly better mean visual acuities between -2.0 to -3.0 diopters in group II. Patients in both groups had high levels of spectacle independence, with no patient reporting dysphotopsia. CONCLUSION: Binocular UNVA was significantly better, with comparable UDVA and mesopic contrast sensitivity when targeting mini monovision with the non-diffractive extended vision IOL as compared to targeting binocular emmetropia.

4.
J Cataract Refract Surg ; 49(2): 159-164, 2023 02 01.
Artículo en Inglés | MEDLINE | ID: mdl-36194106

RESUMEN

PURPOSE: To report intraoperative performance and postoperative outcomes of femtosecond laser-assisted cataract surgery (FLACS) and conventional phacoemulsification (PE) in the hands of junior surgeons. SETTING: Iladevi Cataract & IOL Research Centre, Ahmedabad, Gujarat, India. DESIGN: Prospective single-masked randomized controlled trial. METHODS: 320 eyes (320 patients) undergoing cataract surgery for uneventful cataracts in the hands of junior surgeons were randomized to Group 1-FLACS or Group 2-PE. Intraoperatively, cumulative dissipated energy (CDE) and fluid used were compared. Postoperatively, the following were compared: central corneal thickness (CCT) on day 1, 1 week, and 1 month; corneal clarity (day 1 and 1 week); anterior chamber inflammation (day 1 and 1 week); change in endothelial cell density (ECD) at 6 months postoperatively; and corrected distance visual acuity (CDVA) at 1 week and 1 month postoperatively. RESULTS: 157 and 158 patients in groups 1 and 2 analysed. Intraoperatively, CDE (5.41 ± 2.73 vs 8.83 ± 4.28 in Groups 1 and 2, P = .0001) and fluid used (79.33 ± 33.46 vs 101.82 ± 32.23 mL in Groups 1 and 2, P < .0001) were significantly lesser in Group 1. CCT was significantly higher in Group 2 on day 1 (550.96 ± 33.64 vs 587.70 ± 55.76 µm in Groups 1 and 2, P < .0001) and at 1 week postoperatively (527.94 ± 30.78 vs 545.11 ± 35.17 µm in Groups 1 and 2, P = .001). 72% of eyes had clear corneas on day 1 in Group 1 compared with 39% in Group 2 ( P = .01). Anterior chamber inflammation and CDVA were comparable. Change in ECD was significantly lower (9.3%) in Group 1 vs 12.7% in Group 2, P < .0001. CONCLUSIONS: FLACS showed lower intraoperative CDE, fluid usage, lesser increase in CCT, better early postoperative corneal clarity, and lesser change in ECD at 6 months postoperatively in the hands of junior surgeons during standard cataract surgery.


Asunto(s)
Extracción de Catarata , Catarata , Terapia por Láser , Facoemulsificación , Cirujanos , Humanos , Estudios Prospectivos , Catarata/complicaciones , Rayos Láser
5.
Br J Ophthalmol ; 106(1): 47-53, 2022 01.
Artículo en Inglés | MEDLINE | ID: mdl-33093154

RESUMEN

AIM: To compare intraocular lens (IOL) calculation methods not requiring refraction data prior to myopic laser-assisted in situ keratomileusis (LASIK) and radial keratotomy (RK). METHODS: In post-LASIK eyes, the methods not requiring prior refraction data were Hagis-L; Shammas; Barrett True-K no-history; Wang-Koch-Maloney; 'average', 'minimum' and 'maximum' IOL power on the American Society of Cataract and Refractive Surgeons (ASCRS) IOL calculator. Double-K method and Barrett True-K no-history, 'average', 'minimum' and 'maximum' IOL power on ASCRS IOL calculator were evaluated in post-RK eyes. The predicted IOL power was calculated with each method using the manifest postoperative refraction. Arithmetic and absolute IOL prediction errors (PE) (implanted-predicted IOL powers), variances in arithmetic IOL PE and percentage of eyes within ±0.50 and ±1.00 D of refractive PE were calculated. RESULTS: Arithmetic or absolute IOL PE were not significantly different between the methods in post-LASIK and post-RK eyes. In post-LASIK eyes, 'average' showed the highest and 'minimum' showed the least variance, whereas 'average' and 'minimum' had highest percentage of eyes within ±0.5 D and 'minimum' had the highest percentage of eyes within ±1.0 D. In the post-RK eyes, 'minimum' had highest variance, and 'average' had the least variance and highest percentage of eyes within ±0.5 D and ±1.0 D. CONCLUSION: In post-LASIK and post-RK eyes, there are no significant differences in IOL PE between the methods not requiring prior refraction data. 'Minimum' showed least variance in PEs and more chances of eyes to be within ±1.0 D postoperatively in post-LASIK eyes. 'Average' had least variance and more chance of eyes within ±1.0 D in post-RK eyes.


Asunto(s)
Queratomileusis por Láser In Situ , Queratotomía Radial , Lentes Intraoculares , Miopía , Facoemulsificación , Biometría/métodos , Humanos , Rayos Láser , Miopía/cirugía , Óptica y Fotónica , Refracción Ocular , Estudios Retrospectivos
6.
J Cataract Refract Surg ; 47(7): 842-846, 2021 07 01.
Artículo en Inglés | MEDLINE | ID: mdl-33315732

RESUMEN

PURPOSE: To analyze exhaled airflow patterns in a clinical scenario and the impact of infection control practices and room air circulation in context of the COVID-19 pandemic. SETTING: Raghudeep Eye Hospital, India. DESIGN: Experimental study. METHODS: Ten patients attending ophthalmic outpatient clinic (OPD) and operating room (OR) were included. Using Schlieren imaging, exhaled airflow patterns were documented with/without an N95 mask or face shield during respiratory activities. Recordings were performed with and without room air conditioning turned on. Exhaled airflow patterns in OPD and OR when using vs not using these infection control measures and the impact of room air circulation on these were compared. RESULTS: Five patients each in OPD and OR were included. There was a forward stream of exhaled air from the patient's mouth/nose during all respiratory activities. An N95 mask dampened its intensity and forward transmission. Taping the mask around the nasal bridge further reduced airflow leakage. A mechanical barrier in front of the patient's face blocked forward propagation of the exhaled airflow. Turning on a forceful and direct draft of air over the surgeon's working area dampened and diverted the exhaled airflow away from the surgeons' breathing area. This effect was particularly pronounced in the OR, with the overhead laminar airflow. CONCLUSIONS: Using high force airflow with the draft facing downward can dampen and divert the exhaled airflow away from healthcare providers. Using masks/mechanical barriers and taping the mask reduces potential dissemination of aerosols and, thereby, human and surface contamination.


Asunto(s)
COVID-19 , Pandemias , Humanos , India/epidemiología , Control de Infecciones , Máscaras , SARS-CoV-2
7.
J Cataract Refract Surg ; 47(9): 1205-1209, 2021 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-33929803

RESUMEN

PURPOSE: To compare real-time intraocular pressure (IOP) response to occlusion break event in 2 phacoemulsification systems. SETTING: Iladevi Cataract and IOL Research Center, India. DESIGN: Randomized, experimental study. METHODS: Rabbits were randomized to:Group I (n = 10 eyes), Centurion Vision system with active fluidics, or, Group II (n = 10 eyes), Centurion with Active Sentry. Within each group, parameter set 1 (IOP 30 mm Hg, aspiration flow rate [AFR] 20 mL/min, and vacuum 600 mm Hg) and parameter set 2 (IOP 50 mm Hg, AFR 25 mL/min, and vacuum 600 mm Hg) were tested. Real-time rate of drop and rise of IOP after occlusion break event (mm Hg per second) and percentage reduction of IOP from maximum during nuclear fragment removal were compared. RESULTS: 10 rabbits (20 eyes) were included. Rate of drop of IOP after occlusion break was not significantly different between groups. Rate of rise of IOP was statistically significantly higher in Group II with both parameter sets (199.09 ± 69.28 vs 94.33 ± 45.66 in parameter set 1, P = .006; and 256 ± 45.05 vs 165.25 ± 51.80 in parameter set 2, P = .005), suggesting faster recovery to baseline IOP after occlusion break. The mean percentage reduction of IOP from maximum was significantly higher in Group I (P = .003). CONCLUSIONS: Rise of IOP to baseline after occlusion break event was faster and mean percentage reduction of IOP from maximum during nuclear fragment removal was lower when using the Centurion Vision system with the Active Sentry upgrade compared with the traditional handpiece. The ability to sense IOP at the level of the handpiece with the Active Sentry upgrade allows faster mitigation of surge response.


Asunto(s)
Catarata , Facoemulsificación , Animales , Conejos , Presión Intraocular , Tonometría Ocular , Vacio
8.
J Refract Surg ; 36(8): 557-564, 2020 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-32785730

RESUMEN

PURPOSE: To investigate agreement between biometric measurements obtained from the Lenstar LS 900 (Haag-Streit AG) based on optical low-coherence reflectometry (OLCR) and the Tomey OA-2000 (Tomey Corporation) based on swept-source optical coherence tomography (SS-OCT) in dense cataracts. METHODS: In this prospective observational study, axial length, keratometry, anterior chamber depth (ACD), lens thickness, and central corneal thickness (CCT) were measured in 124 eyes of 76 patients. Intraocular lens prediction errors and absolute prediction errors were assessed based on postoperative manifest refraction. Analyses used were paired t test, Pearson correlation coefficient (r), and Bland-Altman plots. RESULTS: Failure in axial length measurements was noted in 28 eyes (22.58%) with OCLR compared to 2 eyes (1.6%) with SS-OCT. Although not statistically significant, axial length measurements were clinically higher with SS-OCT (23.78 ± 1.76 mm) compared to OCLR (23.72 ± 1.58 mm) (P = .81) (r = 0.23; P = .01). There was a significant trend toward myopic intraocular lens prediction with SS-OCT (-0.09 ± 0.48) compared to OLCR (0.09 ± 0.41, P < .01) (r = 0.25, P = .01). There was good agreement for keratometric and ACD values between the two devices. SS-OCT gave significantly higher values of lens thickness compared to OCLR (4.44 ± 0.44 vs 4.18 ± 0.48 mm, P < .01) (r = 0.39, P < .01). CCT measured with OCLR was significantly higher than SS-OCT (525.64 ± 27.0 vs 513.21 ± 29.24 µm; P < .01) (r = 0.98, P < .01). CONCLUSIONS: One-fifth of the patients with dense cataracts failed axial length measurement on OCLR. SS-OCT gives clinically higher axial length measurements leading to more myopic intraocular lens prediction errors postoperatively. OCLR provides higher pachymetry and lower lens thickness values compared to the SS-OCT device. [J Refract Surg. 2020;36(8):557-564.].


Asunto(s)
Biometría/métodos , Catarata/patología , Implantación de Lentes Intraoculares , Imagen Óptica/instrumentación , Óptica y Fotónica , Facoemulsificación , Tomografía de Coherencia Óptica/instrumentación , Adulto , Anciano , Anciano de 80 o más Años , Cámara Anterior/patología , Longitud Axial del Ojo/patología , Córnea/patología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Reproducibilidad de los Resultados
9.
J Cataract Refract Surg ; 46(8): 1102-1107, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32569028

RESUMEN

PURPOSE: To evaluate long-term visual outcomes and complications after toric intraocular lens (IOL) implantation in children with preexisting corneal astigmatism undergoing cataract surgery. SETTING: Iladevi Cataract & IOL Research Center, Ahmedabad, India. DESIGN: Prospective, interventional case series. METHODS: Children with regular corneal astigmatism of at least 1.5 diopters (D) were included. A standardized surgical technique with in-the-bag implantation of a toric IOL was performed. All children were followed up on postoperative day 1 and periodically thereafter, until 36 months postoperatively. The uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), and residual refractive astigmatism were documented 36 months postoperatively. Rotational stability of toric IOL was also evaluated through the follow-up duration. Complications, particularly visual axis obscuration (VAO) and glaucoma, were documented. RESULTS: In total, 76 eyes (51 children) were included in the study. Mean age at surgery was 7.41 ± 2.82 years (SD) and mean preoperative keratometric astigmatism was 1.56 ± 2.13 D. The CDVA (logarithm of the minimum angle of resolution [logMAR]) improved significantly from 0.59 ± 0.43 preoperatively to 0.23 ± 0.27 36 months postoperatively (P = .03). Mean postoperative UDVA was 0.32 ± 0.26 logMAR. Mean refractive astigmatism at final follow-up was -0.55 ± 0.40 D, with 74% patients having a UDVA of at least 20/40; 5% of eyes needed VAO treatment and none developed glaucoma. No eye required repositioning of toric IOL until final follow-up. CONCLUSIONS: Toric IOL implantation reduced postoperative refractive astigmatism and gave excellent UDVA at 36 months follow-up in pediatric eyes undergoing nontraumatic cataract surgery.


Asunto(s)
Astigmatismo , Catarata , Lentes Intraoculares , Facoemulsificación , Astigmatismo/cirugía , Catarata/complicaciones , Niño , Humanos , India , Implantación de Lentes Intraoculares , Estudios Prospectivos , Refracción Ocular
10.
J Refract Surg ; 34(12): 817-823, 2018 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-30540364

RESUMEN

PURPOSE: To evaluate the outcomes of a new posterior chamber phakic intraocular lens (IPCL; Care Group, Baroda, India) to correct myopia. METHODS: This prospective, observational case series included 30 eyes undergoing implantation of the IPCL for high myopia (> -8.00 diopters [D]). Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction, vault, endothelial cell loss, and adverse events were evaluated 3 years after implantation of the IPCL for high myopia. RESULTS: The mean spherical equivalent decreased from -16.50 ± 5.62 D preoperatively to -0.89 ± 1.27 D at 3 years. The mean UDVA and CDVA were 0.38 ± 0.21 and 0.24 ± 0.09 logMAR. No eye lost any lines and 49% of eyes gained one line or more of CDVA. One eye (3.3%) developed anterior subcapsular cataract, but did not require cataract surgery at 3 years of follow-up. Two eyes (6.6%) developed a mild transient increase in intraocular pressure, which required topical medication only for 3 months. The percentage of endothelial cell loss at 3 years was 9.73% ± 6.72%. The IPCL vault tended to reduce with time, from a mean of 626.66 ± 188.98 µm at 1 month to 540.22 ± 210.76 µm at 3 years. No vision-threatening complications occurred. CONCLUSIONS: Implantation of the new posterior chamber phakic IOL is an effective alternative to correct high myopia, showing good outcomes at 3 years. [J Refract Surg. 2018;34(12):817-823.].


Asunto(s)
Implantación de Lentes Intraoculares , Miopía Degenerativa/cirugía , Lentes Intraoculares Fáquicas , Adulto , Pérdida de Celulas Endoteliales de la Córnea/fisiopatología , Femenino , Estudios de Seguimiento , Humanos , Masculino , Miopía Degenerativa/fisiopatología , Complicaciones Posoperatorias , Estudios Prospectivos , Diseño de Prótesis , Refracción Ocular/fisiología , Resultado del Tratamiento , Agudeza Visual/fisiología , Adulto Joven
11.
J Cataract Refract Surg ; 43(9): 1177-1183, 2017 09.
Artículo en Inglés | MEDLINE | ID: mdl-28991614

RESUMEN

PURPOSE: To compare complications in children up to 4 years old having cataract surgery with intraocular lens (IOL) implantation using 2 techniques: in-the-bag IOL with anterior vitrectomy or optic capture of IOL with no anterior vitrectomy. SETTING: Iladevi Cataract & IOL Research Centre, Ahmedabad, India. DESIGN: Prospective randomized control clinical trial. METHODS: The study included children having cataract surgery with IOL implantation. Patients were randomized to Group 1 (in-the-bag 3-piece hydrophobic acrylic IOL [Acrysof MA60AC] with anterior vitrectomy) or Group 2 (optic capture of the same IOL without anterior vitrectomy). Intraoperative complications were documented. Postoperative visual axis obscuration (VAO), glaucoma, cell deposits on the IOL, and posterior synechiae were compared at 1, 3, 6, and 12 months. RESULTS: The study comprised 61 children (61 eyes). The mean ages were 14.8 months ±11.47 (SD) in Group 1 (n = 30) and 18.2 ± 11.47 months in Group 2 (n = 31). Overall, only 1 eye in Group 1 developed a VAO requiring membranectomy 4 months postoperatively, and 2 eyes in Group 1 developed glaucoma over 12 months (P = .49). Intraocular lens cell deposits and posterior synechiae were comparable between groups. The IOL could not be captured in 5 eyes (16.1%); no complications occurred in these eyes. CONCLUSIONS: Optic capture of 3-piece hydrophobic acrylic IOLs could be achieved in most eyes. The VAO, glaucoma, and inflammation were comparable 12 months postoperatively. Thus, optic capture of an IOL is an alternative surgical technique that can be used to avoid vitrectomy, even in children younger than 4 years.


Asunto(s)
Extracción de Catarata , Implantación de Lentes Intraoculares , Vitrectomía , Niño , Preescolar , Glaucoma/etiología , Humanos , Lentes Intraoculares , Complicaciones Posoperatorias , Estudios Prospectivos , Agudeza Visual , Vitrectomía/métodos
12.
J Cataract Refract Surg ; 41(5): 1081-7, 2015 May.
Artículo en Inglés | MEDLINE | ID: mdl-25935337

RESUMEN

PURPOSE: To evaluate a single-piece hydrophobic acrylic intraocular lens (IOL) with ultraviolet-ozone (UV-O3) treatment on the posterior surface and compare it with an identical untreated IOL in a rabbit model. SETTING: John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. DESIGN: Experimental study. METHODS: Study IOLs were implanted in the right eyes and control IOLs in the left eyes of 10 New Zealand rabbits. Slitlamp examinations were performed 1 to 6 weeks postoperatively. Neodymium:YAG (Nd:YAG) posterior capsulotomy was performed in both eyes of 5 rabbits after the 4-week slitlamp examination. At 6 weeks, the rabbits were killed humanely and their globes were enucleated. Capsular bag opacification was scored from the posterior aspect (Miyake-Apple view), and the eyes were processed for histopathology. RESULTS: At 4 weeks, the mean posterior capsule opacification (PCO) scores were 0.88 ± 0.33 (SD) in the study eyes and 2.55 ± 1.13 in the control eyes (P=.003, 2-tailed paired t test). Performance of Nd:YAG posterior capsulotomy was similar in both groups. Gross postmortem examination also showed statistically less peripheral PCO in eyes with the study IOLs than in control eyes. There was no difference in histopathologic findings between study eyes and control eyes and no signs of untoward inflammation or toxicity in any eye evaluated. CONCLUSIONS: Treatment of the posterior surface of a single-piece hydrophobic acrylic IOL with UV-O3 appears to prevent PCO, likely by increasing adhesion between the posterior capsule and the IOL while retaining uveal biocompatibility. Performance of Nd:YAG posterior capsulotomy was similar between treated IOLs and untreated IOLs.


Asunto(s)
Opacificación Capsular/prevención & control , Cápsula del Cristalino/fisiología , Lentes Intraoculares , Ensayo de Materiales , Cápsula Posterior del Cristalino , Úvea/fisiología , Resinas Acrílicas , Animales , Opacificación Capsular/diagnóstico , Materiales Biocompatibles Revestidos , Interacciones Hidrofóbicas e Hidrofílicas , Láseres de Estado Sólido , Implantación de Lentes Intraoculares , Facoemulsificación , Capsulotomía Posterior , Conejos
13.
Open Ophthalmol J ; 8: 24-6, 2014.
Artículo en Inglés | MEDLINE | ID: mdl-24959305

RESUMEN

PURPOSE: Present a case of dislocation of an Implantable Collamer Lens (ICL) that occurs after blunt trauma and review the published literature on this topic. METHODS: Case report and literature review using PubMed. RESULTS: A 44 year-old male presented to the emergency department with sudden onset of blurry vision after blunt trauma to the left eye. Three years prior, he had undergone bilateral ICL placement for high myopia. On examination, the superotemporal haptic was noted to be dislocated into the anterior chamber, but there was no endothelial touch by the dislocated lens. The patient had an associated hyphema that was medically managed, and 2 weeks after the injury, the patient underwent ICL repositioning. A review of the literature was performed and five previous cases of ICL dislocation were identified. Three of these occurred after blunt trauma. One of these cases was associated with endothelial touch and decompensation and eventually required a descement's stripping endothelial keratoplasty (DSAEK). CONCLUSION: Dislocation of ICLs after blunt trauma is a rare but important potential sequela of the procedure and can lead to corneal decompensation if there is lens-endothelial touch. All patients who suffer blunt dislocation of ICL should be followed long-term after repositioning for signs of endothelial loss and dysfunction.

14.
J Cataract Refract Surg ; 40(9): 1561-4, 2014 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-25135550

RESUMEN

UNLABELLED: We present the case of an 81-year-old man with pseudoexfoliation syndrome (PXF) in whom spontaneous bilateral anterior partial in-the-bag intraocular lens (IOL) dislocation was diagnosed following a routine dilated examination that demonstrated only mild pseudophacodonesis with no evidence of subluxation. Uneventful cataract surgery with placement of single-piece hydrophobic acrylic posterior chamber IOLs had been performed in both eyes 7 years previously. Bilateral IOL repositioning with scleral fixation was performed to correct the dislocation. Postoperative examinations showed remarkable improvement in visual acuity and IOL stability. We hypothesize that zonular weakness secondary to PXF predisposed the patient to bilateral IOL partial dislocation. Pupil dilation in the setting of mild pseudophacodonesis at the time of routine examination may have been a precipitating factor. To our knowledge, bilateral IOL subluxation/dislocation has been described in a limited number of case reports. FINANCIAL DISCLOSURE: No author has a financial or proprietary interest in any material or method mentioned.


Asunto(s)
Migracion de Implante de Lente Artificial/etiología , Examen Físico , Anciano de 80 o más Años , Migracion de Implante de Lente Artificial/cirugía , Síndrome de Exfoliación/complicaciones , Humanos , Implantación de Lentes Intraoculares , Masculino , Facoemulsificación , Reoperación , Esclerótica/cirugía , Técnicas de Sutura
15.
J Cataract Refract Surg ; 40(12): 2113-9, 2014 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-25465689

RESUMEN

PURPOSE: To evaluate long-term uveal and capsular biocompatibility of a new accommodating intraocular lens (IOL). SETTING: John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. DESIGN: Experimental study. METHODS: Bilateral phacoemulsification was performed in 14 rabbits; 1 eye received the accommodating IOL (Fluidvision) and the other received a hydrophobic acrylic control IOL. Slitlamp examinations were performed at postoperative weeks 1 to 4 and months 2, 3, 4, and 6. Six rabbits were humanely killed at 2 months and 8 rabbits at 6 months. After gross examination with the Miyake-Apple view, selected IOLs were removed for implant cytology. All globes were then sectioned and processed for histopathologic examination. RESULTS: Uveal biocompatibility of study and control IOLs was similar in clinical and pathologic examinations up to 6 months postoperatively. In the study group, anterior capsule opacification appeared absent and posterior capsule opacification (PCO) was significantly less than in the control group. At the gross examination at 6 months, central PCO was 0.8 ± 0.5 (SD) in the study IOLs and 3.7 ± 0.4 in the control IOLs (P < .0001, 2-tailed paired t test). Histopathologic examination confirmed the relative lack of capsule opacification in study eyes compared with controls and the absence of untoward inflammatory reaction or toxicity in all eyes. CONCLUSIONS: The accommodating IOL maintained an expanded capsular bag secondary to the large size of the haptic elements without significant contact with the anterior capsule. This appeared to prevent overall capsular bag opacification and to retain uveal and capsular biocompatibility.


Asunto(s)
Materiales Biocompatibles , Opacificación Capsular/prevención & control , Reacción a Cuerpo Extraño/prevención & control , Cápsula del Cristalino/patología , Lentes Intraoculares , Úvea/patología , Uveítis/prevención & control , Animales , Fibrosis/prevención & control , Estudios de Seguimiento , Implantación de Lentes Intraoculares , Ensayo de Materiales , Modelos Animales , Facoemulsificación , Diseño de Prótesis , Conejos
16.
J Cataract Refract Surg ; 38(5): 849-57, 2012 May.
Artículo en Inglés | MEDLINE | ID: mdl-22520309

RESUMEN

PURPOSE: To report the intraoperative performance and postoperative outcomes in eyes with anterior persistent fetal vasculature (PFV). SETTING: Iladevi Cataract & IOL Research Centre, India, and Filatov Institute Odessa, Ukraine. DESIGN: Prospective interventional case series. METHODS: Eyes with anterior PFV had surgery using a standardized surgical technique. Plaque peeling was used for small plaques and partial excision for larger plaques. In eyes in which the entire lens converted into a fibrovascular tissue, extensive capsulectomy with anterior 2-port limbal vitrectomy was performed. Microphthalmic eyes had no intraocular lens implantation. RESULTS: This study comprised 33 eyes. The mean age at surgery was 6.30 months ± 5.16 (SD). Microcornea was observed in 10 eyes (30.3%). Within the morphology of cataract, 10 eyes (30.3%) had the lens converted into fibrovascular mass, of which 4 had associated prominent ciliary process. Anterior continuous curvilinear capsulorhexis (CCC) and manual posterior CCC were performed in 23 eyes (69.7%) and 3 eyes (9.1%), respectively. Intraoperatively, posterior capsule plaque was seen in 20 eyes (60.6%). In 31 eyes (93.9%), 2-port limbal anterior vitrectomy was performed and in 2 eyes (6.1%), pars plana vitrectomy was performed. Intraocular lens implantation was performed in 16 eyes (48.5%); 17 eyes (51.5%) were left aphakic. Visual axis obscuration was observed in 6 eyes (18.2%). At the 3-year follow-up, visual acuity remained stable in 11 eyes (33.3%) and improved in 22 eyes (66.6%). CONCLUSION: The results suggest that good visual outcomes can be obtained in PFV eyes after surgical intervention, with an acceptable rate of serious postoperative complications. FINANCIAL DISCLOSURE: No author has a financial or proprietary interest in any material or method mentioned.


Asunto(s)
Capsulorrexis/métodos , Vítreo Primario Hiperplásico Persistente/cirugía , Afaquia Poscatarata/etiología , Preescolar , Córnea/anomalías , Femenino , Humanos , Lactante , Periodo Intraoperatorio , Cápsula del Cristalino/cirugía , Implantación de Lentes Intraoculares , Masculino , Microftalmía/etiología , Periodo Posoperatorio , Estudios Prospectivos , Resultado del Tratamiento , Agudeza Visual/fisiología , Vitrectomía
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA