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회절성 이중 다초점 인공수정체와 회절성 삼중 다초점 인공수정체의 임상 결과 비교

Comparison of the Visual Outcomes after Cataract Surgery with Implantation of a Bifocal and Trifocal Diffractive Intraocular Lens

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목적: 회절성 이중 다초점 인공수정체(Acrysof ReSTOR® SN6AD1)와 회절성 삼중 다초점 인공수정체(AT LISA® tri 839MP)의 단기간 시각적 및 광학적 임상결과를 비교하고자 한다. 대상과 방법: 백내장 수술을 시행 받은 43명 51안을 대상으로, 24안은 회절성 삼중 다초점 인공수정체(AT LISA® tri 839MP), 27안은 회절성 이중 다초점 인공수정체(Acrysof ReSTOR® SN6AD1)를 삽입하였다. 술 후 1개월, 3개월째 근거리, 중간거리, 원거리 시력 및 굴절값을 측정하였고, 술 후 3개월째 OQAS II®를 이용한 시력의 질, CGT-2000®을 이용한 대비감도검사, 자동시야검사, 초점심도를 측정하여 두 군에서 비교하였다. 결과: 술 후 3개월째 두 군에서 원거리 및 근거리 시력과 광학 질은 차이가 없었으나 중간거리(63 cm, 80 cm, 100 cm)에서 시력은 삼중 다초점군이 통계적으로 유의하게 좋았다. 대비감도는 명소시에서는 두 군에 차이가 없었으나 박명시에서는 원거리(5 m)에서 이중 다초점군이, 암소시 및 박명시에서는 근거리(30 cm)에서 삼중 다초점군이 유의하게 높게 측정되었다. 초점심도 검사상 삼중 다초점군이 중간 거리에서 더 깊은 초점심도를 보였다. 결론: 회절성 삼중 다초점 인공수정체는 이중 다초점 인공수정체와 비교하여 원거리와 근거리의 시력 및 광학 질은 동일하면서 중간거리 시력은 더 잘 보이며 야간 근거리 대비감도가 높았다.

Abstract

Purpose: To evaluate and compare visual outcomes and optical quality after implantation of a bifocal (Acrysof ReSTOR® SN6AD1) or trifocal (AT LISA® tri 839MP) diffractive intraocular lens (IOL). Methods: Fifty-one eyes of 43 patients undergoing cataract surgery were enrolled and assigned to one of two groups: the trifocal group, comprising 24 eyes implanted with the trifocal diffractive IOL (AT LISA® tri 839MP), and the bifocal group, comprising 27 eyes implanted with the bifocal diffractive IOL (Acrysof ReSTOR® SN6AD1). Visual acuity (distant, intermediate, and near vision) and refractive postoperative outcomes were evaluated at one and three months postoperatively. Measurements of optical quality (using OQAS II®), contrast sensitivity (using CGT-2000®), automated visual field examination, and evaluation of defocus curve were performed three months postoperatively. Results: No statistically significant differences between the two groups were found in three-month postoperative distant and near (40 cm) visual acuities and optical quality. However, intermediate (63 cm, 80 cm, and 100 cm) visual acuities were significantly better in the trifocal group. Distant contrast sensitivity (5 m) under mesopic conditions was significantly better with the bifocal lens, whereas near contrast sensitivity (30 cm) under mesopic and scotopic conditions was significantly better with trifocal lens. There was no statistical difference between the groups under photopic conditions. In the defocus curve, the visual acuity was significantly better at intermediate distance in the trifocal group. Conclusions: Trifocal diffractive IOLs provide significantly better intermediate vision than bifocal IOLs, with equivalent postoperative levels of distant and near vision and ocular optical quality. Further, they provide better near contrast sensitivity under scotopic condition compared to diffractive bifocal IOLs.

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