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1.
J Ophthalmol ; 2019: 7018937, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31885892

RESUMEN

Prospective, randomized, comparative, and controlled study to estimate the association between angle κ distance and higher-order aberrations (HOAs) with postoperative visual acuity after presbyopia-correcting IOL implantation. Forty-three eyes from 43 patients were included and randomly assigned in two groups for either AT LISA tri 839MP or Acrysof IQ PanOptix IOL implantation. The OPD-Scan III analyzer was utilized to assess the angle κ distance and higher-order aberration (HOAs). Twenty-three eyes were in the Acrysof IQ PanOptix group and 20 patients in the AT LISA tri 839MP group. The uncorrected distance visual acuity (UDVA) for the PanOptix group was 0.092 ± 0.10, whereas for AT LISA tri was 0.050 ± 0.06 (P=0.229). The uncorrected intermediate visual acuity (UIVA) for the PanOptix group was 0.173 ± 0.18, whereas for AT LISA tri, it was 0.182 ± 0.11 (P=0.669). Uncorrected near visual acuity (UNVA) was 0.068 ± 0.04 and 0.085 ± 0.07, respectively (P=0.221). Also, correlation coefficient between HOAs and the Strehl ratio for each group were -0.768 (P < 0.0001) and -0.863 (P=0.0001). Patients implanted with both trifocal IOLs showed excellent postoperative visual performance at all distances at the six-month follow-up visit. No association was found between angle κ distance and postoperative visual acuity regardless of the angle κ magnitude or the two trifocal IOLs inner optical diameter. Also, internal aberrations demonstrated a significant inverse correlation with the Strehl ratio for both trifocal IOLs.

2.
J AAPOS ; 22(2): 148-149, 2018 04.
Artículo en Inglés | MEDLINE | ID: mdl-29331455

RESUMEN

Pediatric cataract surgery poses a significant challenge for the cataract surgeon, in part because an elastic anterior capsule can make capsulorhexis difficult. With the use of femtosecond laser-assisted cataract surgery (FLACS), however, the continuous curvilinear capsulorhexis can be made with predictable size, circular shape, centration, and accuracy. In addition, topical anesthesia can be used for the FLACS docking procedure in cooperative children above 6 years of age, using transparent adhesive polyurethane film segments.


Asunto(s)
Capsulorrexis , Extracción de Catarata/métodos , Terapia por Láser/métodos , Implantación de Lentes Intraoculares , Anestesia Local/métodos , Anestésicos Locales/administración & dosificación , Niño , Humanos , Masculino , Seudofaquia/fisiopatología , Refracción Ocular/fisiología , Tetracaína/administración & dosificación , Agudeza Visual/fisiología
3.
Int Ophthalmol ; 38(3): 951-957, 2018 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-28444525

RESUMEN

PURPOSE: To compare the biometric measurements obtained from the Verion Image-Guided System to those obtained by auto-refracto-keratometer in normal eyes. METHODS: This is a prospective, observational, comparative study conducted at the Asociación para Evitar la Ceguera en México I.A.P., Mexico. Three sets of keratometry measurements were obtained using the image-guided system to assess the coefficient of variation, the within-subject standard deviation and intraclass correlation coefficient (ICC). A paired Student t test was used to assess statistical significance between the Verion and the auto-refracto-keratometer. A Pearson's correlation coefficient (r) was obtained for all measurements, and the level of agreement was verified using Bland-Altman plots. RESULTS: The right eyes of 73 patients were evaluated by each platform. The Verion coefficient of variation was 0.3% for the flat and steep keratometry, with the ICC being greater than 0.9 for all parameters measured. Paired t test showed statistically significant differences between groups (P = 0.0001). A good correlation was evidenced for keratometry values between platforms (r = 0.903, P = 0.0001 for K1, and r = 0.890, P = 0.0001). Bland-Altman plots showed a wide data spread for all variables. CONCLUSION: The image-guided system provided highly repeatable corneal power and keratometry measurements. However, significant differences were evidenced between the two platforms, and although values were highly correlated, they showed a wide data spread for all analysed variables; therefore, their interchangeable use for biometry assessment is not advisable.


Asunto(s)
Afaquia Poscatarata/diagnóstico , Biometría/métodos , Extracción de Catarata , Córnea/patología , Topografía de la Córnea/métodos , Lentes Intraoculares , Adolescente , Adulto , Afaquia Poscatarata/fisiopatología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Diseño de Prótesis , Reproducibilidad de los Resultados , Adulto Joven
4.
Int Ophthalmol ; 35(4): 557-64, 2015 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-25099249

RESUMEN

The purpose of this study is to determine baseline vitreous humor temperature during a combined phacoemulsification and pars plana vitrectomy (PPV) procedure; to determine what is the temperature variation during phacoemulsification; and to compare vitreous temperature to sublingual temperature. The methods used are prospective, interventional and comparative study. Patients with a diagnosis of cataract and vitreous hemorrhage, programed for a combined procedure of phacoemulsification and PPV, were included. Patients were excluded if posterior capsular rupture existed during the anterior segment procedure. A thermoprobe was inserted through a PPV trocar. Measurement of the vitreous temperature was obtained at baseline and throughout phacoemulsification, at the end of every surgical step, and every 5 min. Sublingual temperature was measured with the same probe at the end of the surgery. Room temperature was registered. Seventeen eyes of 17 patients were included. Mean sublingual temperature was 36.5 °C (standard deviation [σ] 0.26 °C). Mean total vitreous temperature was 31.47 °C (σ 2.1 °C). Mean baseline vitreous temperature was 33.04 °C (σ 0.99 °C). Comparison of sublingual temperature with baseline vitreous temperature resulted in a significant difference (t test P < 0.000. 95 % confidence interval 2.93-3.98). Temperature measured by surgical step and surgical time presented a significant decrease in temperature from baseline (Kruskal-Wallis P < 0.000, P = 0.003, respectively). Vitreous humor is significantly hypothermic when compared to sublingual temperature. Vitreous temperature decreases significantly during phacoemulsification.


Asunto(s)
Temperatura Corporal/fisiología , Fenómenos Fisiológicos Oculares , Facoemulsificación , Cuerpo Vítreo/fisiología , Hemorragia Vítrea/cirugía , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Estudios Retrospectivos , Termodinámica , Vitrectomía/métodos
5.
J Refract Surg ; 28(4): 302-4, 2012 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-22335205

RESUMEN

PURPOSE: To examine the stability and efficacy of high-cylinder power AcrySof toric intraocular lenses (IOLs), models SN60T6, SN60T7, SN60T8, and SN60T9 (Alcon Laboratories Inc). METHODS: Eligible eyes had cataract and symmetric corneal astigmatism > 2.25 diopters (D). Outcomes included monocular uncorrected distance visual acuity (UDVA), manifest refraction, and assessment of IOL axis. RESULTS: Nineteen eyes from 14 patients had preoperative corneal astigmatism of 4.00 ± 1.10 D. Postoperatively, residual refractive cylinder was 0.55 ± 0.60 D at 3 months. Uncorrected distance visual acuity was 1.3 ± 0.5 logMAR preoperatively and improved to 0.11 ± 0.09 logMAR 3 months postoperatively (P<.0001). All IOLs were stable within 5°. CONCLUSIONS: The IOLs were stable and effective in correcting high amounts of preexisting astigmatism at the time of cataract surgery.


Asunto(s)
Resinas Acrílicas , Astigmatismo/complicaciones , Catarata/complicaciones , Implantación de Lentes Intraoculares , Lentes Intraoculares , Astigmatismo/fisiopatología , Humanos , Proyectos Piloto , Seudofaquia/fisiopatología , Refracción Ocular/fisiología , Agudeza Visual/fisiología
6.
Clin Ophthalmol ; 3: 219-26, 2009.
Artículo en Inglés | MEDLINE | ID: mdl-19668569

RESUMEN

OBJECTIVE: To evaluate the effectiveness of prophylactic administration of nepafenac 0.1% in maintaining mydriasis and in preventing postoperative macular edema following cataract surgery. METHODS: This was a prospective, randomized, single-masked comparative study in 60 patients undergoing phacoemulsification cataract surgery. Patients were randomized to either the nepafenac or the control group. Nepafenac was administered 3 times daily 1 day before surgery and continued for 6 weeks. The control group received tobramycin-dexamethasone treatment only. Trans-operative mydriasis was measured before surgery, after nuclear emulsification, following cortex aspiration, and at the conclusion of surgery. Macular optical coherence tomography determined central foveal thickness (FT) and total macular volume (TMV) before surgery and at 2 and 6 weeks after surgery. All patients received tobramycin-dexamethasone for 2 weeks after surgery. RESULTS: The difference in mean pupil size, at the end of surgery, between the control group (6.84 +/- 0.93 mm) and the nepafenac group (7.91 +/- 0.74 mm) was statistically significant (p < 0.001). There were no significant differences in FT values between the two groups at any time point; however, TMV at 2 and at 6 weeks was statistically significantly different (p < 0.001), with higher TMV in the control group. CONCLUSION: Prophylactic use of nepafenac was effective in reducing macular edema after cataract surgery and in maintaining trans-operative mydriasis.

8.
Am J Ophthalmol ; 135(1): 118-20, 2003 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-12504719

RESUMEN

PURPOSE: To describe an unusual case of idiopathic retinal vasculitis, aneurysms, and neuroretinitis (IRVAN) syndrome with rapid dynamics in the number and appearance of the aneurysms. DESIGN: Observational case report. METHODS: Clinical and angiographic data of the patient were reviewed. RESULTS: In the course of only 6 months, preexisting retinal aneurysms resolved while new ones appeared. Changes were observed in the shape and size of preexisting lesions. The resolution of lesions in eyes previously untreated by laser is reported for the first time. CONCLUSIONS: Vascular lesions in IRVAN syndrome may show an unusually rapid turnover. The resolution of aneurysms is a part of the natural course of the disease and may occur without previous retinal laser photocoagulation.


Asunto(s)
Aneurisma/complicaciones , Arteria Retiniana/patología , Vasculitis Retiniana/complicaciones , Retinitis/complicaciones , Adulto , Aneurisma/diagnóstico , Aneurisma/fisiopatología , Femenino , Angiografía con Fluoresceína , Humanos , Vasculitis Retiniana/diagnóstico , Vasculitis Retiniana/fisiopatología , Retinitis/diagnóstico , Retinitis/fisiopatología , Síndrome , Agudeza Visual
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