2 research outputs found
Triple procedure; analysis of outcome, refraction, and intraocular lens power calculation
AIMS: A total of 97 triple procedures performed over a 6 year period were
studied retrospectively to determine the best approach to calculate
intraocular lens power. METHODS: The cases were divided into two
diagnostic categories. RESULTS: After 1 year best corrected visual acuity
was 20/40 or better in 37.5% of the cases of the 'modified group'. This
group consists of patients with the diagnosis Fuchs' dystrophy,
non-guttate endothelial dystrophy, and Reis-Buckler dystrophy. Analysis of
visual acuity was made using logMAR. A final postoperative refraction
within 2 dioptres of predicted refraction was achieved in 76.5% of
patients in the modified group. CONCLUSION: In future, in the absence of a
keratometry, a keratometry value of 7.49 mm will be used for calculation
of the power of the implant as analysed in this study
Long-term results of corneal wedge resections for the correction of high astigmatism
Abstract
We retrospectively evaluated 41 corneal wedge resections, performed for the correction of high astigmatism in 40 patients who were spectacle and contact lens intolerant. Keratometric astigmatism decreased from an average of 11.7 diopters (range 5 to 22.5 D) preoperatively to 3.5 diopters (range 0 to 10 D) postoperatively, representing a mean reduction of 8.2D (range 0 to 16.5), or 70%. The length of follow-up averaged 11 months. Twenty-five, 15 and 9 cases had a follow-up of at least 3, 5 and 10 years, respectively. In 16 cases the keratometry readings remained stable over the years. However, in 1 case of Fuchs' endothelial dystrophy (follow-up 13 years) and 5 cases of keratoconus (follow-up 3, 4, 12, 13 and 14 years) the astigmatism gradually increased during the various follow-up periods. In 3 other cases the astigmatism gradually decreased over the years. Corneal wedge resection is an effective technique for managing high corneal astigmatism. The results remain stable over the years except in some patients with keratoconus