Abstract

Prospective Interventional randomized Comparative single blinded Study
Purpose: To evaluate changes in astigmatism and higher order aberrations of total, anterior and posterior corneal surface after 2.2mm and 2.8mm incision cataract surgery.
Method: 100 patients were taken in the study and were divided randomly in 2.2 mm and 2.8mm incision group. Corneal astigmatism and HOA pre operatively, post operatively at 1week, 6 week and 3 months were measured using Sirius topography.
Results : Both group showed increase in the HOA especially coma and trefoil at posterior corneal surface in 5mm zone. There was increase in coma HOA in both anterior and posterior surface and trefoil HOA in 5 mm zone in anterior and total corneal surface
Conclusion : Phacoemulsification with clear corneal incision leads to postoperative increase in the astigmatism and HOA which come back to the preoperative level in 3 months of time. The amount of astigmatism and HOA is dependent on the incision size.