Induced Astigmatism and High-Order Aberrations after 1.8-mm, 2.2-mm and 3.0-mm Coaxial Phacoemulsification Incisions.
10.3341/jkos.2011.52.4.407
- Author:
Sang Jeong MOON
1
;
Dong Jun LEE
;
Kyung Hun LEE
Author Information
1. Sungmo Eye Hospital, Busan, Korea. sungmo@sungmo.co.kr
- Publication Type:Original Article ; Randomized Controlled Trial
- Keywords:
Coaxial microincisional cataract surgery;
High-order aberration;
Surgically induced astigmatism
- MeSH:
Astigmatism;
Cataract;
Coma;
Eye;
Lotus;
Phacoemulsification
- From:Journal of the Korean Ophthalmological Society
2011;52(4):407-413
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To study theeffect of micro incision (1.8 mm) and small incision (2.2 mm and 2.8 mm) coaxial phacoemulsification on surgically induced astigmatism (SIA) and high-order aberrations (HOA) of anterior and posterior corneal surface. METHODS: The present randomized clinical study included 32 eyes having a 1.8-mm, 38 eyes having a 2.2-mm, and 30 eyes having a 2.8-mm corneal incision. SIAs were measured at 1 and 3 months postoperatively. HOAs included coma, trefoil, and spherical aberration. The coma-root mean square (RMS) and trefoil-RMS were evaluated at 1 month after the cataract operation. RESULTS: Surgically induced astigmatisms were 0.41 +/- 0.30 diopter (D) in the 1.8-mm incision group, 0.47 +/- 0.21 D in 2.2-mm group and 0.71 +/- 0.50 D in the 2.8-mm group. The SIA of the 1.8-mm group was smaller than the other groups (p = 0.002). There was no statistically significant difference in coma, spherical aberration of the corneal anterior surface and trefoil, or spherical aberration of the posterior surface among the 3 groups at 1 month after surgery. CONCLUSIONS: Incision size contributes to postoperative corneal astigmatism. Phacoemulsification cataract surgery with less than 2.8-mm incision does not significantly influence the corneal aberrationsof anterior and posterior corneal surfaces.
