ABSTRACT
The aim was to compare the corneal topography and tomography parameters of macular corneal dystrophy [MCD], granular corneal dystrophy [GCD] and lattice corneal dystrophy [LCD] patients obtained by Scheimpflug imaging system. The charts, photographs and topography images of patients were reviewed retrospectively. This study included 73 eyes of 73 patients [28 MCD, 20 GCG and 25 LCD patients]. Topography images were obtained by Pentacam [Oculus Optikgerate, Wetzlar, Germany]. The densitometry readings at the corneal apex were used for the statistics. The female to male ratio was 13/15 in MCD group, 12/8 in GCD group and 13/12 in LCD group. The mean age median age was 32, 45 and 53 years in MCD, GCD and LCD groups respectively. The groups were similar regarding the gender [p=0.861]. The MCD group was significantly younger than the other two groups [p<0.001]. The median [minmum-maximum] corneal densities were 100 [100-100], 68 [17-100] and 97 [34-100] Pentacam densitometry units in MCD, GCD and LCD groups respectively. The corneal density at the corneal apex was significantly higher in MCD group than in the other groups [p<0.001]. The GCD and LCD groups were statistically similar in terms of density of the corneal apex [p=0.079]. In MCD group, corneal thickness at the apex and at the thinnest location was significantly thinner, than in the other groups [p=.002 for thickness at apex between MCD and LCD, and p<.001 for all the remaining comparisons]. In MCD group corneal volume was significantly smaller than in the other groups [p<.001 for all comparisons]. Densitometry on Scheimpflug imaging system gives information on the density of corneal opacities
ABSTRACT
The purpose of this study is to evaluate and to compare the results of primary and secondary scleral-fixated posterior chamber intraocular lens [PCIOL] implantations in adult patients. A retrospective analysis of scleral-fixated PCIOLs-implanted during [primary group] or after [secondary group] cataract surgery was performed. The median follow-up time of 96 patients was 6 months [minimum- 6 maximum: 35 months]. Outcome measures were indications, corrected distance visual acuity [CDVA], change in visual acuity and complications. A total of 37 patients [38.5%] had primary implantations and 59 [61.5%] had secondary implantations. Penetrating keratoplasty was combined with secondary implantation in 13 cases. The median post-operative CDVA was 0.5 in decimal notation in both groups [P - 0.576]. The CDVA improved by at least one Snellen line or remained unchanged in 35 eyes [94.6%] in the primary group and in 52 eyes [88.1%] in the secondary group [P= 0.263]. Eyes with CDVA of 0.5 or higher were 62.2% [n = 23] in the primary group and 67.8%] [n - 40] in the secondary group post-operatively [P= 0.066]. The difference in early and late complications were not statistically significant between groups [P= 0.637, P- 0.154, respectively]. Regarding late complications, 30 eyes [81%] in the primary group and 40 eyes [67.9%] in the secondary group had no complications [P- 0.154]. Both primary and secondary scleral-fixated PCIOL implantations can provide favorable visual outcomes with lower complication rates. An important consideration is the appropriate timing for scleral fixation, taking into account the patient's characteristics and the course of the operation