Change in Efficiency of Aspheric Intraocular Lenses Based on Pupil Diameter

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• 作者：Youngsub EomAuthor Vitae ; Eunjoo Yoo ; Su-Yeon Kang ; Hyo-Myung Kim ; Jong-Suk Song ; ^{crisim@korea.ac.kr}Author Vitae
• 刊名：American Journal of Ophthalmology
• 出版年：2013
• 出版时间：March, 2013
• 年：2013
• 卷：155
• 期：3
• 页码：492-498.e2
• 全文大小：871 K

文摘

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Purpose

To measure the effect of spherical aberration correction by aspheric intraocular lenses (IOLs) based on pupil diameter, and to determine the minimum pupil diameter for each aspheric IOL.

Design

Retrospective cross-sectional study.

Methods

Eight-six patients (169 eyes) who were implanted with a HOYA AF-1 NY-60 (HOYA Corporation) or Tecnis ZCB00 1-piece IOL (Abbott Medical Optics Inc) were enrolled. Ocular, corneal, and internal spherical aberrations were measured at the 1-month postoperative visit using the Wavefront Analyzer KR-1W (Topcon). Minimum pupil diameter, which is required for each aspheric IOL to be effective, was calculated using a regression equation.

Results

The mean value of internal spherical aberration of the Tecnis ZCB00 group (?0.09 ¡À 0.094?¦Ìm) was lower than that of the HOYA NY-60 group (?0.05 ¡À 0.072?¦Ìm) (P?= .005). The original negative spherical aberrations of the HOYA NY-60 (?0.18?¦Ìm) were measured at a pupil diameter of 5.6?mm, and for the Tecnis ZCB00 (?0.27?¦Ìm) at a pupil diameter of 6.1?mm. The aspheric IOL efficiency dropped to 0 % when the pupil diameter was 3.47?mm for the Tecnis ZCB00 group and 3.71?mm for the HOYA NY-60 group.

Conclusions

When the pupil diameters of patients are smaller than 3.4?mm for the Tecnis ZCB00 and 3.7?mm for the HOYA NY-60, the spherical aberration correction using these aspheric IOLs seems to be ineffective. Approximately 10 % of the eyes showed smaller pupil size than the minimum effective diameter under mesopic conditions.