PURPOSE To compare the astigmatic outcomes of phacoemulsification cataract surgery using temporal versus nasal clear corneal incisions. METHODS In a clinical trial, consecutive patients with senile cataracts underwent phacoemulsification and implantation of a hydrophobic acrylic foldable intraocular lens through a horizontal clear corneal incision (temporal in right and nasal in left eyes). O...

Until recently, the pursuit of emmetropia in patients with astigmatism (around 30% of the population) was infeasible since the only intraocular lenses available on the market were designed to correct myopia or hyperopia. However, with the new toric lens designs now available, a patient’s cataract, myopia, hyperopia and astigmatism can all be corrected by means of a simple, safe operation follow...

PURPOSE This study aimed to investigate changes in visual acuity, corneal parameters, and topographic parameters after pterygium surgery. DESIGN A prospective observational study was conducted. METHODS Twenty eyes of 20 participants undergoing pterygium excision with conjunctival autograft secured using human fibrin tissue adhesive were included in the study. All the participants were asses...

Background/aims—Post-keratoplasty astigmatism can be managed by selective suture removal in the steep axis. Corneal topography, keratometry, and refraction are used to determine the steep axis for suture removal. However, often there is a disagreement between the topographically determined steep axis and sutures to be removed and that determined by keratometry and refraction. The purpose of thi...

PURPOSE To investigate the effect of pterygium surgery on corneal topography and contrast sensitivity. PATIENT AND METHODS The IRB approved this prospective, nonrandomized, self-controlled study. Computerized videokeratography (Orbscan II) was performed in 36 patients with primary pterygia, both before and 1 month after pterygium excision with limbal-conjunctival autografting. The topographic...

Background: In leprosy, the eyes are frequently affected and many patients were found to have a higher degree of corneal astigmatism than expected during their routine cataract work up. Aim: To compare pre-existing (before any surgical intervention) corneal astigmatism in leprosy patients as compared to age-matched normal controls. Methods: A retrospective study was done, using the charts of le...

BACKGROUND/AIMS Post-keratoplasty astigmatism can be managed by selective suture removal in the steep axis. Corneal topography, keratometry, and refraction are used to determine the steep axis for suture removal. However, often there is a disagreement between the topographically determined steep axis and sutures to be removed and that determined by keratometry and refraction. The purpose of thi...

PURPOSE To determine the shape and astigmatism of the posterior corneal surface in a healthy population with age, using Scheimpflug photography corrected for distortion due to the geometry of the Scheimpflug imaging system and the refraction of the anterior corneal surface. METHODS Scheimpflug imaging was used to measure in six meridians the cornea of the right eye of 114 subjects, ranging in...

PURPOSE To report the use of circular keratotomy in eyes with stage I and II keratoconus to reduce astigmatism. METHODS A retrospective analysis was performed of all eyes operated from 1993 to 2006 by one surgeon using circular keratotomy for stage I and II keratoconus. Results were evaluated for reduction of corneal astigmatism, refractive stability, and change in best spectacle-corrected vi...

RESULTS: No statistically significant differences were found in corneal astigmatism vectorial decomposition (J0 and J45) between the preoperative evaluation and each postoperative visit (p > 0.05). However, statistically significant differences in refractive astigmatism vectorial decomposition (J0 and J45) were found between preoperative and postoperative measurements (p < 0.05). Refractive ast...