| Induced Astigmatism and High-Order Aberrations after 1.8-mm, 2.2-mm and 3.0-mm Coaxial Phacoemulsification Incisions. |
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Sang Jeong Moon, Dong Jun Lee, Kyung Hun Lee |
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Sungmo Eye Hospital, Busan, Korea. sungmo@sungmo.co.kr |
| 2.8 mm 이하의 절개창 크기의 동축 백내장수술에서 난시 유발과 각막 고위수차 비교 |
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문상정⋅이동준⋅이경헌 |
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Sungmo Eye Hospital, Busan, Korea |
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Correspondence:
Kyung Hun Lee, MD |
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| 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. |
| Key Words:
Coaxial microincisional cataract surgery;High-order aberration;Surgically induced astigmatism |
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