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1.
Cornea ; 43(2): 184-189, 2024 Feb 01.
Article in English | MEDLINE | ID: mdl-37170402

ABSTRACT

PURPOSE: This study aimed to compare the long-term endothelial cell loss, graft survival, and clinical outcomes in patients with Fuchs endothelial dystrophy (FED) after Descemet stripping endothelial keratoplasty (DSEK) and Descemet membrane endothelial keratoplasty (DMEK) using a standardized surgical protocol. METHODS: Three hundred and six consecutive DSEK and DMEK grafts of 223 patients with FED performed by 8 surgeons between January 2006 and August 2022 were analyzed. The primary outcome measures were graft survival, endothelial cell loss, and best spectacle-corrected visual acuity. RESULTS: At 5 years, graft survival was 96% for both DSEK and DMEK eyes. The mean percentage of endothelial cell loss was 57.7 ± 17.1 in DSEK and 56.8 ± 15.2 in DMEK eyes ( P = 0.430). The mean best spectacle-corrected visual acuity was 0.13 ± 0.14 logMAR in DSEK and 0.01 ± 0.18 logMAR in DMEK grafts ( P <0.00001) at 5 years postoperatively. Rebubbling was performed in 7.8% DSEK and 2.1% DMEK grafts ( P = 0.441). Cox regression identified rejection episodes (HR 6.5; 95% CI: 1.70-24.8; P = 0.0062) as a significant contributing factor for graft failure. CONCLUSIONS: DMEK had superior visual acuity outcomes compared with DSEK in these patients up to 5 years after surgery. At 5 years, there was no significant difference in graft survival or endothelial cell loss between DSEK and DMEK eyes with FED. We propose that our standardized technique reduces the need for rebubbling.


Subject(s)
Descemet Stripping Endothelial Keratoplasty , Fuchs' Endothelial Dystrophy , Humans , Fuchs' Endothelial Dystrophy/surgery , Descemet Stripping Endothelial Keratoplasty/methods , Endothelium, Corneal/transplantation , Descemet Membrane/surgery , Visual Acuity , Retrospective Studies , Cell Count
4.
Eye (Lond) ; 37(2): 371-372, 2023 02.
Article in English | MEDLINE | ID: mdl-35915235

Subject(s)
Cornea , Tissue Adhesives , Humans
5.
Eye (Lond) ; 37(12): 2494-2498, 2023 08.
Article in English | MEDLINE | ID: mdl-36522529

ABSTRACT

OBJECTIVES: To analyse risk factors and long-term outcomes after rebubbling and graft detachment in Descemet membrane endothelial keratoplasty (DMEK). METHODS: 176 consecutive DMEK grafts of 125 patients performed by 8 surgeons with a standardised technique between January 2015 and July 2022 were analysed. Main outcome measures were graft detachments, rebubbling rate, postoperative outcomes, and risk factors for graft failure and rebubbling. RESULTS: 6 (3.4%) grafts required rebubbling (>1/3 area detached). 40 (22.7%) grafts developed self-resolving partial detachments (<1/3 area detached). The mean time to rebubble was 16 ± 9.4 days. Mean BSCVAs at 5 years postoperative were 0.03 ± 0.16, 0.03 ± 0.14, and 0.15 ± 0.31 logMAR in fully attached, partially detached and rebubbled grafts (P = 0.437). 5-year graft survival were 98%, 90%, and 83% in fully attached, partially detached and rebubbled eyes (P = 0.02). There was significantly greater endothelial cell loss (ECL) in the rebubbled eyes (P = 0.018). Intraoperative trauma was a risk factor for graft failure (HR 1.81; 95% CI: 1.33-2.50; P = 0.023). An indication for surgery other than Fuchs endothelial dystrophy was a risk factor for rebubbling (HR 5.28; 95% CI: 5.11-72.4; P = 0.007). CONCLUSION: DMEK grafts had better graft survival if there was no partial detachment or rebubbling at 5 years postop. There was significant ECL associated with rebubbling. A standardised technique reduces rebubbling and graft failure risk.


Subject(s)
Descemet Stripping Endothelial Keratoplasty , Fuchs' Endothelial Dystrophy , Humans , Descemet Membrane/surgery , Descemet Stripping Endothelial Keratoplasty/adverse effects , Descemet Stripping Endothelial Keratoplasty/methods , Retrospective Studies , Visual Acuity , Fuchs' Endothelial Dystrophy/surgery , Graft Survival , Endothelium, Corneal/transplantation
6.
Am J Ophthalmol ; 234: 215-222, 2022 02.
Article in English | MEDLINE | ID: mdl-34416181

ABSTRACT

PURPOSE: To determine 10-year outcomes for graft and endothelial cell survival after Descemet stripping endothelial keratoplasty (DSEK), including risk factors for graft failure. DESIGN: Retrospective clinical cohort study. METHODS: Three hundred fifty-six consecutive DSEK grafts performed by 10 surgeons using a standardized protocol were analyzed. Primary outcomes were cumulative graft survival and percentage endothelial cell loss (ECL) from 6 months to 10 years; secondary outcomes included risk factors for graft failure, postoperative complications, visual outcomes, and central corneal thickness. RESULTS: Indications include Fuchs endothelial dystrophy (n = 209), bullous keratopathy (n = 88), and previous graft failure (n = 39). One hundred and four eyes (29%) had preoperative glaucoma. Cumulative graft survival rates of all eyes at 1, 3, 5, and 10 years were 97%, 90%, 85%, and 79%, respectively. Ten-year graft survival for Fuchs endothelial dystrophy was 92%. Mean ± SD percentage ECL of all grafts was 46.6% ± 17.3% at year 1, 54.9% ± 18.7% at year 3, 59.6% ± 17.4% at year 5, and 73.1% ± 9.7% at year 10. Cox regression identified preoperative glaucoma (hazard ratio [HR]: 8.41; 95% CI, 1.30-54.5; P = .026), including previous glaucoma surgery (HR: 3.63; 95% CI: 1.03-12.74; P = .04) and regrafts (HR: 5.29; 95% CI: 2.02-13.89; P = .001) as significant risk factors for graft failure. CONCLUSIONS: At 10 years, DSEK survival rate was 79% for all eyes, including complex grafts, and ECL was 73%. For Fuchs endothelial dystrophy, 10-year graft survival rate was 92%. Despite a mean 10-year endothelial cell count of only 692 cells/mm2, graft survival remained high with good vision. DSEK continues to be a viable treatment option, especially in complex eyes with comorbidity.


Subject(s)
Descemet Stripping Endothelial Keratoplasty , Fuchs' Endothelial Dystrophy , Cohort Studies , Descemet Stripping Endothelial Keratoplasty/methods , Endothelial Cells , Endothelium, Corneal/transplantation , Follow-Up Studies , Fuchs' Endothelial Dystrophy/etiology , Fuchs' Endothelial Dystrophy/surgery , Graft Survival , Humans , Retrospective Studies , Visual Acuity
7.
Am J Ophthalmol ; 218: 1-6, 2020 10.
Article in English | MEDLINE | ID: mdl-32437670

ABSTRACT

PURPOSE: This study compared the outcomes after Descemet's membrane endothelial keratoplasty (DMEK) in pseudophakic patients with the outcomes after DMEK combined with cataract surgery (triple-DMEK) in patients with Fuchs' endothelial dystrophy (FED). DESIGN: Retrospective, single-institution, interventional, consecutive case series. METHODS: Outcomes of 114 DMEKs in patients with FED at a minimum of 1-year follow-up were reviewed. A total of 34 eyes (29 patients) were pseudophakic and underwent only DMEK (DMEK-only), and 80 eyes (56 patients) underwent triple-DMEK. Main outcome measurements included endothelial cell loss (ECL), best-corrected visual acuity (BCVA), central corneal thickness (CCT), and complications. RESULTS: At 1 month, ECL was 25% (±16%) and 35% (±15%) in DMEK-only and triple-DMEK groups, respectively. At 1 year, ECL was 33% (±13%) and 41% (±16%) in DMEK-only and triple-DMEK groups, respectively. There was statistically significantly less ECL after DMEK-only than after triple-DMEK at both 1 month (95% confidence interval [CI]: 1.67-15.02; P = .016) and 1 year (95% CI: 1.06-14.07; P = .034). CCT was significantly lower after DMEK-only than after triple-DMEK at 1 month but not at 1 year. BCVA was excellent and similar in the 2 groups. There were no cases of graft failure. Graft rejection and rebubbling rates were similar in DMEK-only and triple-DMEK groups: rejection occured in 8.8% and 8.75% of cases respectively (P = .50), and rebubbling in 2.9% and 2.5% respectively (P = .44). CONCLUSIONS: Both the DMEK-only and the triple-DMEK groups had low rebubbling rates and good visual outcomes, but the combined triple-DMEK procedure resulted in significantly greater loss of endothelial cells than DMEK-only surgery at both 1 month and 1 year.


Subject(s)
Corneal Endothelial Cell Loss/etiology , Descemet Stripping Endothelial Keratoplasty/adverse effects , Fuchs' Endothelial Dystrophy/surgery , Aged , Aged, 80 and over , Cell Count , Cornea/pathology , Corneal Endothelial Cell Loss/diagnosis , Corneal Endothelial Cell Loss/physiopathology , Endothelium, Corneal/pathology , Female , Follow-Up Studies , Fuchs' Endothelial Dystrophy/physiopathology , Graft Survival/physiology , Humans , Lens Implantation, Intraocular , Male , Middle Aged , Phacoemulsification , Postoperative Complications , Retrospective Studies , Treatment Outcome , Visual Acuity/physiology
8.
Cornea ; 38(10): 1332-1335, 2019 Oct.
Article in English | MEDLINE | ID: mdl-31219884

ABSTRACT

PURPOSE: To present a case series of patients with corneal and scleral changes associated with the use of skin-lightening creams. This is the first report of corneal changes with these widely available creams. METHODS: Three patients of West African origin presented with strikingly similar skin, corneal, and scleral changes and were found to have all been using skin-lightening creams containing hydroquinone. Histopathology was obtained for 1 patient. RESULTS: Three patients were referred to the corneal clinics of 2 hospitals with corneal changes and a history of blurred vision for 1 to 3 years. There was a 60-year-old woman from Nigeria and a 68-year-old woman and a 73-year-old man both from Ghana. All 3 had been using skin-lightening lotions containing hydroquinone on their faces for between 3 and 15 years and had black-blue facial pigmentation of exogenous ochronosis, a recognized complication of these creams. Their corneas all had horizontal striae radiating across the posterior corneas with scleral thinning and plaques. Linear brown epithelial pigmentation was observed within the lower third of the corneas. Biopsy of the sclera in 1 patient showed ochronosis. CONCLUSIONS: We present previously unreported eye changes associated with the use of skin-lightening creams containing hydroquinone, with a triad of signs: posterior corneal striae radiating from 3 o'clock to 9 o'clock, thinning and plaques in the sclera, and a normal endothelial cell count. Similar pathological changes are seen in exogenous ochronosis, a recognized skin complication of hydroquinone, are seen in the sclera.


Subject(s)
Alkaptonuria/diagnosis , Cornea/pathology , Hydroquinones/adverse effects , Ochronosis/diagnosis , Sclera/pathology , Administration, Topical , Aged , Alkaptonuria/chemically induced , Biopsy , Cornea/drug effects , Dermatologic Agents/administration & dosage , Dermatologic Agents/adverse effects , Female , Humans , Hydroquinones/administration & dosage , Male , Middle Aged , Ochronosis/chemically induced , Sclera/drug effects
9.
Cornea ; 37(12): 1484-1489, 2018 Dec.
Article in English | MEDLINE | ID: mdl-30222712

ABSTRACT

PURPOSE: High intraocular pressure (IOP) is common in association with intracameral air and gas tamponade after Descemet membrane endothelial keratoplasty (DMEK); yet its influence on endothelial cell survival is unknown. Our aim was to determine the effect of high IOP measured 2 hours after DMEK on 1-month endothelial cell density (ECD). The influence of other potentially relevant factors was also investigated. METHODS: Retrospective, consecutive series. Inclusions: low-to-moderate risk DMEK surgery alone or combined with phacoemulsification. EXCLUSIONS: previous penetrating keratoplasty or glaucoma surgery; grafts with any of the following in the first month: rebubble, rejection, or graft failure. RESULTS: Sixty-two grafts met inclusion with 60 having IOP recorded at 2 hours. Thirty-eight percent (23/60) had IOP >30 mm Hg and 22% (13/60) had IOP >40 mm Hg at 2 hours. All grafts with IOP >30 mm Hg had air released and immediate normalization of pressure. One-month ECD (mean ± standard error of mean) was 1872 ± 58 cells/mm, representing cell loss of 29.8 ± 2.0%. Two-hour IOP was highly insignificant against 1-month ECD when tested as a continuous variable (P = 0.78). Lower 1-month ECD was statistically correlated with lower donor count (P = 0.002) and combined DMEK-phaco surgery (P = 0.01) on univariate and multivariate analysis. Insignificant factors (P > 0.05) against 1-month ECD included patient age, sex and race, surgical indication (Fuchs endothelial dystrophy vs. non-Fuchs endothelial dystrophy), and donor age. CONCLUSIONS: Increased IOP at 2 hours is common after DMEK, but does not seem to influence early endothelial cell survival. One-month ECD was influenced by donor counts and combined cataract surgery.


Subject(s)
Descemet Membrane/surgery , Descemet Stripping Endothelial Keratoplasty/adverse effects , Endothelium, Corneal/pathology , Fuchs' Endothelial Dystrophy/surgery , Glaucoma/etiology , Intraocular Pressure/physiology , Postoperative Complications , Aged , Cell Count , Female , Follow-Up Studies , Fuchs' Endothelial Dystrophy/diagnosis , Glaucoma/physiopathology , Humans , Male , Retrospective Studies , Time Factors , Tissue Donors , Visual Acuity
10.
Eye (Lond) ; 32(10): 1629-1635, 2018 10.
Article in English | MEDLINE | ID: mdl-29921952

ABSTRACT

PURPOSE: To report surgical outcomes and endothelial cell density (ECD) trends up to 2 years post-operatively in the first cohort of eyes undergoing Descemet's membrane endothelial keratoplasty (DMEK) for low-to-moderate risk indications at our UK centre. Tight corneal sutures were used to ensure high intraoperative pressure from intracameral air for 10-min and to maintain a good post-operative air fill. Outcomes were compared to a prior series at our unit of similar eyes having Descemet's stripping endothelial keratoplasty (DSEK). METHODS: Retrospective, interventional series. Inclusions: all DMEKs with a minimum of 1-month follow-up. EXCLUSIONS: prior glaucoma surgery, penetrating keratoplasty or anterior chamber lens. RESULTS: 88 DMEKs met inclusion. Median follow-up: 332 days. Main indication: Fuchs dystrophy (90%). COMPLICATIONS: re-bubbling 2%, primary failure 6%, retinal detachment 2%, rejection 3%. At 3 months, BCVA ≥6/6 and ≥6/9 were 67% and 86%, respectively. Graft survival at both 1 and 2 years was 94 ± 2%. Mean(±SD) cell-loss at 1 month, 3 months, 6 months, 12 months and 24 months: 30 ± 15%, 29 ± 16%, 33 ± 17%, 35 ± 17% and 48 ± 16%, respectively. Compared to a prior series at our unit of 210 low-to-moderate risk DSEKs, cell loss was lower for DMEK at all time-points (p < 0.001) through to 12 months but was not statistically different at 24 months. Mixed-modelling of ECD over time demonstrated the convergence of DMEK and DSEK curves by 2 years. CONCLUSIONS: DMEK using tissue from UK eye-banks resulted in high survival and excellent visual acuity. ECD through 1 year was superior to DSEK in a similar cohort. Our low re-bubble rate (2%) may be attributable to use of intracameral air at temporarily elevated intraocular pressure.


Subject(s)
Descemet Membrane/surgery , Descemet Stripping Endothelial Keratoplasty/methods , Fuchs' Endothelial Dystrophy/surgery , Adult , Aged , Aged, 80 and over , Cell Count , Corneal Endothelial Cell Loss/pathology , Descemet Stripping Endothelial Keratoplasty/standards , Endothelial Cells/pathology , Endothelium, Corneal/surgery , Female , Graft Survival , Humans , Kaplan-Meier Estimate , Male , Middle Aged , Retrospective Studies , United Kingdom , Visual Acuity
11.
Cornea ; 36(5): 553-560, 2017 May.
Article in English | MEDLINE | ID: mdl-28306600

ABSTRACT

PURPOSE: To report 5-year outcomes for graft survival and endothelial cell survival after Descemet stripping endothelial keratoplasty (DSEK) including regression modeling for cell survival over time. METHODS: This is a single-institution, retrospective, consecutive interventional series of 210 primary DSEK grafts operated for low-to-moderate risk indications, specifically Fuchs dystrophy and bullous keratopathy. Primary outcomes were cumulative graft survival and % endothelial cell loss from 3 months through 5 years; the secondary outcome was to trend endothelial cell density over time by least-squares and mixed nonlinear modeling. RESULTS: Cumulative graft survival was high at 99%, 98%, and 94% at 1, 3, and 5 years, respectively. Mean endothelial cell loss was (mean ± SD) 44% ± 16%, 56% ± 17%, and 67% ± 13% at 1, 3, and 5 years. The trend in mean endothelial cell density over time by least square regression was accurately and parsimoniously described by a straight line taking earliest values (3 mo) through to 5 years, with a rate of cell loss of 148 ± 13 cells·mm·yr. Higher-order polynomial and exponential models did not provide a closer regression fit. Mixed nonlinear modeling using exponential decay equations confirmed a relatively stable rate of cell loss for DSEK from 3 months through to 5 years, in contrast to penetrating keratoplasty models using similar techniques in previous studies. CONCLUSIONS: DSEK graft survival is high in our series through 5 years. Endothelial cell loss occurs at a relatively constant albeit low-grade rate from the earliest postoperative measurements through 5 years.


Subject(s)
Corneal Diseases/surgery , Descemet Stripping Endothelial Keratoplasty , Aged , Aged, 80 and over , Cell Count , Corneal Diseases/pathology , Endothelial Cells/pathology , Endothelium, Corneal/pathology , Follow-Up Studies , Fuchs' Endothelial Dystrophy/surgery , Graft Survival , Humans , Models, Theoretical , Regression Analysis , Retrospective Studies
13.
Cornea ; 34(10): 1252-8, 2015 Oct.
Article in English | MEDLINE | ID: mdl-26203744

ABSTRACT

PURPOSE: To determine the long-term outcomes of Descemet stripping endothelial keratoplasty (DSEK) in iridocorneal endothelial (ICE) syndrome. METHODS: Retrospective review of a consecutive series of 4 eyes of 4 patients with ICE syndrome treated by DSEK surgery at a single institution with follow-up between 2 and 7 years. RESULTS: Mean follow-up after initial DSEK surgery was 55 months (range, 24-95 months). One eye required 1 repeat DSEK, and 2 eyes required 2 repeat DSEKs for a total of 9 DSEK operations across the 4 eyes. There were no graft dislocations and no primary graft failures. Seven of 9 grafts achieved a visual acuity of 6/12 or better by 6 months. Mean endothelial cell loss at 3, 6, 12, and 24 months was 55 ± 14%, 78 ± 5%, 80 ± 6%, and 83 ± 9%, respectively. Long-term graft survival was poor with 7 of 9 grafts suffering late endothelial failure by a mean of 18 ± 7 months (range, 12-28 months). Mean graft survival on Kaplan-Meier analysis was 19 months (95% confidence interval, 14-24 months). CONCLUSIONS: DSEK has the potential to provide good short-term visual outcomes in eyes with ICE syndrome. However, long-term graft survival beyond 2 years is poor because of late endothelial failure. Patients with ICE considering DSEK surgery should be warned about the high probability of repeat surgery.


Subject(s)
Descemet Stripping Endothelial Keratoplasty/methods , Iridocorneal Endothelial Syndrome/surgery , Postoperative Complications , Aged, 80 and over , Cell Count , Endothelium, Corneal/pathology , Female , Follow-Up Studies , Graft Survival/physiology , Humans , Intraoperative Complications , Iridocorneal Endothelial Syndrome/physiopathology , Kaplan-Meier Estimate , Male , Middle Aged , Reoperation , Retrospective Studies , Treatment Outcome , Visual Acuity/physiology
14.
Ophthalmology ; 120(12): 2449-2455.e1, 2013 Dec.
Article in English | MEDLINE | ID: mdl-24070808

ABSTRACT

OBJECTIVE: To compare spectacle independence in patients randomized to receive bilateral multifocal intraocular lenses (IOLs) or monofocal IOLs with the powers adjusted to produce monovision. DESIGN: Randomized, multicenter clinical trial. PARTICIPANTS: A total of 212 patients with bilateral, visually significant cataract. METHODS: Before bilateral sequential cataract surgery, patients were randomized (allocation ratio 1:1) to receive bilateral Tecnis ZM900 diffractive multifocal lenses (Abbott Medical Optics, Santa Ana, CA) or Akreos AO monofocal lenses (Bausch & Lomb, Rochester, NY) with the powers adjusted to target -1.25 diopters (D) monovision. Outcomes were assessed 4 months after the second eye underwent operation. MAIN OUTCOME MEASURES: The primary outcome was spectacle independence. Secondary outcomes included questionnaires (VF-11R, dysphotopsia symptoms, and satisfaction) and visual function measures (near, intermediate, and distance logarithm of minimum angle of resolution [logMAR] visual acuity, stereoacuity, contrast sensitivity, and forward light scatter). RESULTS: A total of 212 patients were randomized, and 187 patients (88%) returned for assessment 4 months after surgery. Uniocular distance refractions in the monovision arm showed a mean spherical equivalent of +0.075 D in the distance eye and -0.923 in the near eye. In the multifocal arm, the mean distance spherical equivalents were -0.279 D and -0.174 D in the right and left eyes, respectively. A total of 24 of 93 patients (25.8%) in the monovision arm and 67 of 94 patients (71.3%) in the multifocal arm reported never wearing glasses (P<0.001, Fisher exact test). The adjusted odds ratio of being spectacle free was 7.51 (95% confidence interval, 3.89-14.47). Binocular uncorrected acuities did not differ significantly for distance (0.058 logMAR for monovision vs. 0.076 for multifocal, P = 0.3774) but were significantly worse in the multifocal arm for intermediate acuity (0.149 vs. 0.221, P = 0.0001) and in the monovision arm for near acuity (0.013 vs. -0.025, P = 0.037). In the first postoperative year, 6 patients (5.7%) in the multifocal arm underwent IOL exchange (4 had a bilateral and 2 had a unilateral exchange). No patients in the monovision arm underwent IOL exchange. CONCLUSIONS: Patients randomized to bilateral implantation with the diffractive multifocal Tecnis ZM900 were more likely to report being spectacle independent but also more likely to undergo IOL exchange than those randomized to receive monofocal implants (Akreos AO) with the powers adjusted to give low monovision.


Subject(s)
Cataract/physiopathology , Lens Implantation, Intraocular , Lenses, Intraocular , Phacoemulsification , Pseudophakia/physiopathology , Aged , Contrast Sensitivity/physiology , Double-Blind Method , Eyeglasses/statistics & numerical data , Female , Humans , Male , Prosthesis Design , Treatment Outcome , Vision, Binocular/physiology , Visual Acuity/physiology
15.
Am J Ophthalmol ; 153(1): 38-43.e1, 2012 Jan.
Article in English | MEDLINE | ID: mdl-21907966

ABSTRACT

PURPOSE: To compare a new insertion method using an EndoGlide (Angiotech/Network Medical Products) with the standard Busin glide (Moria USA) assisted insertion of the posterior lamellar corneal graft in Descemet stripping endothelial keratoplasty (DSEK). DESIGN: Prospective, consecutive, comparative, nonrandomized study. METHODS: Surgery was performed between October 2008 and October 2010 in 52 eyes of 52 consecutive patients with endothelial dysfunction suitable for DSEK. Twenty-two consecutive eyes underwent the new EndoGlide-assisted insertion of donor lenticule and 30 eyes underwent the surgery using the Busin glide. Six-month follow-up data are available for all patients. Clinical details, best-corrected visual acuity, manifest refraction, intraoperative and postoperative complications, and corneal endothelial cell loss were assessed at 6 months after DSEK. RESULTS: At 6 months after surgery, the best-corrected visual acuity was similar in both groups (0.13 logarithm of the minimal angle of resolution in the EndoGlide eyes as compared with 0.15 logarithm of the minimal angle of resolution in the Busin group; P = .34). Mean spherical equivalent was 0.65 diopter (D) and 0.51 D, and mean refractory cylinder was 1.39 D and 1.08 D, respectively (P = .40). The endothelial cell loss was much lower in the EndoGlide group (25.76%) as compared with the Busin group (47.46%; P < .0001). CONCLUSIONS: In conclusion, the new EndoGlide results in significantly less endothelial cell loss than Busin glide donor insertion in DSEK. The visual outcomes and refractive changes were similar in both groups.


Subject(s)
Corneal Diseases/surgery , Descemet Stripping Endothelial Keratoplasty/methods , Endothelium, Corneal/transplantation , Aged , Anterior Chamber/surgery , Corneal Endothelial Cell Loss/diagnosis , Endothelium, Corneal/pathology , Female , Follow-Up Studies , Humans , Intraoperative Complications , Male , Postoperative Complications , Prospective Studies , Refraction, Ocular/physiology , Tissue Donors , Visual Acuity/physiology
16.
Cornea ; 28(1): 58-61, 2009 Jan.
Article in English | MEDLINE | ID: mdl-19092407

ABSTRACT

AIM: The antibacterial effect of topical anesthetics may lead to false-negative cultures from corneal specimens of bacterial keratitis. This in vitro study compared the antibacterial effect of 3 unpreserved topical anesthetics to indicate the most appropriate agent for corneal scrapes. METHODS: Four bacterial strains (Staphylococcus epidermidis, Staphylococcus aureus, Pseudomonas aeruginosa, and Streptococcus pneumoniae) derived from the most frequently isolated microorganisms from corneal ulcers were cultured from stored control stocks and clinical specimens. These strains were used to determine the minimum inhibitory concentration (MIC) of 3 preservative-free anesthetic eyedrops: proxymetacaine 0.5%, oxybuprocaine 0.4%, and tetracaine 1%. RESULTS: There was no inhibition of growth seen with proxymetacaine 0.5% (5000 microg/mL) with any of the organisms except S. epidermidis, which demonstrated an MIC of 2500 microg/mL (equivalent to a dilution of (1/2)). Tetracaine 1% (10,000 microg/mL) produced an MIC ranging between 625 and 1250 microg/mL, inhibiting all 4 strains at the commercially available dilution. Oxybuprocaine 0.4% (4000 microg/mL) resulted to be the second most inhibitory preparation with an MIC ranging between 1000 and 2000 microg/mL. CONCLUSIONS: Currently used preservative-free topical anesthetics differ in bacterial growth inhibition. This in vitro study showed that proxymetacaine 0.5% is the least inhibitory on bacterial growth and therefore the most appropriate to be used before corneal scrapes.


Subject(s)
Anti-Bacterial Agents/pharmacology , Cornea , Drug Utilization , Hospital Departments , Ophthalmology , Specimen Handling/methods , Anesthetics, Local/administration & dosage , Anesthetics, Local/pharmacology , Anti-Bacterial Agents/administration & dosage , Bacterial Infections/diagnosis , Cornea/microbiology , False Negative Reactions , Hospital Departments/trends , Humans , In Vitro Techniques , Keratitis/microbiology , Microbial Sensitivity Tests , Ophthalmic Solutions , Ophthalmology/trends , Preservatives, Pharmaceutical , Procaine/analogs & derivatives , Procaine/pharmacology , Propoxycaine/pharmacology , Tetracaine/pharmacology
17.
J Cataract Refract Surg ; 34(6): 1029-32, 2008 Jun.
Article in English | MEDLINE | ID: mdl-18499014

ABSTRACT

A questionnaire survey with forced-choice and free-text items was sent to 856 United Kingdom ophthalmology consultants to ascertain their views on live surgery (ie, direct transmission of surgery from an operating room into a conference hall). The response rate was 63%. The 2 most popular answers for the benefits of live surgery were that it demonstrated surgical practice unedited (65% of respondents) and was interesting to watch (60%). The 2 most commonly stated disadvantages were that the surgeon was placed under greater stress (92%) and that such surgery was conducted with unfamiliar operating rooms/equipment/staff (91%). The complication rate was perceived to be higher than the background rate by 68% of respondents. Sixty-eight percent said there were no teaching benefits that could not be delivered by edited video recordings. Eighty-three percent thought that live surgery was not in the patient's best interest, and 64% thought it should not continue to be performed. The results suggest a need for detailed guidance and standards for the conduct of live surgical demonstrations.


Subject(s)
Health Surveys , Ophthalmologic Surgical Procedures , Ophthalmology/statistics & numerical data , Surveys and Questionnaires , Telemedicine/statistics & numerical data , Telemetry , Education, Medical/methods , Humans , Teaching/methods , United Kingdom
18.
J Cataract Refract Surg ; 33(6): 1041-4, 2007 Jun.
Article in English | MEDLINE | ID: mdl-17531700

ABSTRACT

PURPOSE: To assess the feasibility of determining intraocular lens (IOL) power by measurement of the central optic thickness using clinically available Scheimpflug imaging (Pentacam, Oculus). SETTING: King's College Hospital Ophthalmology Department, London, United Kingdom. METHODS: Sixty-seven eyes were assessed 1 month after uneventful phacoemulsification with in-the-bag implantation of AcrySof MA60AC IOLs (Alcon). The correlation between IOL thickness measurement and IOL power was calculated. Repeatability of central optic thickness measurement was determined from 10 successive scans of 4 patients. RESULTS: Within-subject standard deviation increased with the subject mean. The coefficient of variability was 1.4%. Measured lens thickness was highly correlated with lens power (R(2) = 0.94, P<.001). Over the measured range, 95% confidence intervals varied between +/-0.83 diopters (D) and +/-0.92 D. CONCLUSIONS: Central IOL thickness measurements with the Pentacam Scheimpflug camera were highly repeatable and closely correlated with the known IOL power. The IOL power, calculated from a regression equation, is likely to be less than +/-1.00 D away from the actual power. Approximate in vivo IOL power determination is feasible with clinically available Scheimpflug imaging. This could be applied clinically in cases of unexplained postoperative refractive error.


Subject(s)
Diagnostic Techniques, Ophthalmological , Lenses, Intraocular , Optics and Photonics , Photography/methods , Aged , Aged, 80 and over , Feasibility Studies , Female , Humans , Lens Implantation, Intraocular , Male , Middle Aged , Phacoemulsification , Postoperative Period , Reproducibility of Results
19.
J Cataract Refract Surg ; 32(7): 1188-95, 2006 Jul.
Article in English | MEDLINE | ID: mdl-16857508

ABSTRACT

PURPOSE: To compare the capsular and uveal reaction after implantation of a plate-haptic silicone intraocular lens (IOL) (C11UB, Chiron) and a hydrophobic acrylic (AcrySof MA60, Alcon) IOL in diabetic patients. SETTING: Moorfields Eye Hospital and St. Thomas' Hospital, London, United Kingdom. METHODS: Thirty-five diabetic patients were recruited consecutively and randomly assigned to have implantation of either of the 2 IOLs. The percentage area of posterior capsule opacification (PCO), anterior capsule contraction (ACC), and postoperative inflammatory indices (flare and cells) were assessed objectively at 2 to 3 weeks, 6 months, and 1 year. Between-group and within-group analyses were conducted using the Student t test or Mann-Whitney test and Friedmann test, respectively. RESULTS: Between-group analysis showed the percentage area of PCO was significantly greater in patients with plate-haptic silicone IOLs at 6 and 12 months (P = .002). At 6 months, ACC was significantly greater in the plate-haptic group (P = .04), but the difference was not significant at 12 months. There was higher flare in the hydrophobic acrylic IOL group than in the plate-haptic silicone IOL group at 2 to 3 weeks (P = .08). Within-group analysis showed that over the follow-up period, the plate-haptic silicone group, but not the hydrophobic acrylic group, had a progressive increase in PCO (P = .003). In the hydrophobic acrylic group, but not the plate-haptic silicone group, there was a significant reduction in the mean anterior chamber flare value (P = .01). There was no significant difference in visual acuity or contrast sensitivity at any postoperative visit. CONCLUSION: In diabetic patients, hydrophobic acrylic IOLs can lead to an increased flare in the early postoperative period but they seem to be more favorable than plate-haptic silicone IOLs because the latter lead to more PCO.


Subject(s)
Acrylic Resins , Diabetic Retinopathy/complications , Lens Implantation, Intraocular , Lenses, Intraocular , Phacoemulsification , Postoperative Complications , Silicone Elastomers , Aged , Aged, 80 and over , Biocompatible Materials , Diabetes Mellitus, Type 1/complications , Diabetes Mellitus, Type 2/complications , Female , Foreign-Body Reaction/diagnosis , Humans , Hydrophobic and Hydrophilic Interactions , Lens Capsule, Crystalline/pathology , Male , Middle Aged , Pilot Projects
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