Surgically Induced Posterior Corneal Astigmatism in 2.2 mm Microcoaxial Cataract Surgery Versus 2.85 mm Coaxial Conventional Cataract Surgery.

Park, Min Ji; Park, Yu Li; Kim, Hyun Seung

doi:2015.56.10.1534

J Korean Ophthalmol Soc > Volume 56(10); 2015 > Article

Original Article

Journal of the Korean Ophthalmological Society 2015;56(10):1534-1543.
DOI: https://doi.org/10.3341/jkos.2015.56.10.1534 Published online October 15, 2015.

Surgically Induced Posterior Corneal Astigmatism in 2.2 mm Microcoaxial Cataract Surgery Versus 2.85 mm Coaxial Conventional Cataract Surgery.

Min Ji Park, Yu Li Park, Hyun Seung Kim

Department of Ophthalmology, The Catholic University of Korea College of Medicine, Seoul, Korea. sara514@catholic.ac.kr

2.2 mm 동축 소절개 백내장 수술과 2.85 mm 동축 절개 백내장 수술 후의 후면각막난시변화

박민지⋅박율리⋅김현승

가톨릭대학교 의과대학 안과학교실

Received: 8 May 2015 • Revised: 7 August 2015 • Accepted: 22 September 2015

Abstract

PURPOSE
To compare the surgically induced posterior astigmatism of microcoaxial cataract surgery using a 2.2 mm incision and conventional cataract surgery using a 2.85 mm incision. METHODS: This study included 56 eyes that underwent phacoemulsification and intraocular lens insertion. Subjects were divided into 2 groups: 26 eyes receiving a microcoaxial cataract surgery using a 2.2 mm incision (MCCS group) and 30 eyes receiving a conventional cataract surgery using a 2.85 mm incision (CCS group). Anterior, posterior and total corneal astigmatism was measured. The surgically induced anterior astigmatism, surgically induced posterior astigmatism and surgically induced total astigmatism were compared between MCCS and CCS groups. Corneal astigmatism was measured using a Pentacam(R) device (Oculus, Wetzlar, Germany), uncorrected visual acuity, best corrected visual acuity and corneal aberrations of front and rear side was measured preoperatively and at 1 day, 1 month and 2 months postoperatively. RESULTS: There was no difference in surgically induced posterior astigmatism between CCS and MCCS groups, however, surgically induced anterior astigmatism and surgically induced total astigmatism were significantly lower in the MCCS group than in the CCS group (p = 0.005 and, p = 0.036, respectively). There was a significant positive linear correlation between surgically induced posterior astigmatism and surgically induced total astigmatism in the CCS group (p = 0.01, r = 0.563). There was also a significant positive linear correlation between surgically induced anterior astigmatism and surgically induced total astigmatism in both CCS and MCCS groups (CCS group: p = 0.00, r = 0.855; MCCS group: p = 0.039, r = 0.407). CONCLUSIONS: There was no significant difference in the surgically induced posterior astigmatism between the MCCS and CCS groups. However, surgically induced posterior astigmatism significantly affected surgically induced total astigmatism in the CCS group but not in the MCCS group. Considering both anterior and posterior astigmatism of the cornea, microcoaxial cataract surgery using a 2.2 mm incision affects surgically induced total astigmatism less than conventional cataract surgery.

Key Words: Microcoaxial cataract surgery;Pentacam;Posterior astigmatism;Surgically induced astigmatism