Dysphotopsia after Phacoemulsification Cataract Surgery: Superior versus Temporal Corneal Incision
Hamidreza Hasani1 *
- Alborz University of Medical Sciences
Abstract: To compare positive and negative dysphotopsia after superior versus temporal corneal incision uncomplicated phacoemulsification cataract surgery in patients with healthy macula and identical intraocular lens.
Methods: This randomized clinical trial study was conducted on 92 patients with a normal fundus examination, whom underwent uncomplicated phacoemulsification cataract surgery with a single piece acrylic hydrophobic Tecnis® intraocular lens, by single surgeon and the same surgical instruments. In group A, 46 patients underwent superior main corneal incision and group B, 46 patients tolerated temporal main corneal incision. Patients were evaluated for positive and negative dysphotopsia as primary outcome measure, and visual acuity, contrast sensitivity and astigmatism as secondary outcome measures on post op date 1,6 and 12 months after surgery.
Results: 49 patients (53%) were male and 43 (47%) were female. Positive dysphotopsia was much more in group B in contrast to group A (p<0.04). Negative dysphotopsia (p=0.19), visual acuity (p=0.44) and astigmatism (p=0.21) were not statistically different in both groups. Although, the mean contrast sensitivity increased after surgery (P-value < 0.001) in both groups, but no statistically significant difference seen between two groups (p=0.39).
Conclusion: Positive dysphotopsia is more prevalent with temporal corneal incision compared to superior one in an uncomplicated phacoemulsification cataract surgery. There is no difference in negative dysphotopsia, visual acuity, contrast sensitivity and astigmatism between two corneal incision sites. Superior corneal main incision is preferred to temporal incision regarding less post-operative positive dysphotopsia.
