31 October 2016 Multifocal intraocular lens to correct presbyopia
Author Affiliations +
Abstract
Due to the loss of the flexibility of the crystalline lens, presbyopia is the most common vision dysfunction for adults after 40. To correct presbyopia, this paper presents a design of a MIOL, which can give extended clear vision range both in photopic vision(3mm pupil diameter) and in the mesopic vision(4.5mm pupil diameter). With a pseudophakic eye model, a multi-configuration with object distance covering a full range of normal visual from 8m to 0.4m was applied. The surfaces of MIOL were aspherical diffractive surface. MIOL was divided into two regions: the inner zone was optimized when the pupil diameter was 3mm and the outer zone was optimized when the pupil diameter was 4.5mm. Finally, we got a 22 diopters (D) MIOL with a central thickness of 0.652mm and an optical diameter of 4.5mm. By evaluating the modulation transfer function, we got optical performance of the pseudophakic eye with this MIOL. When the pupil diameter of pseudophakic eye was 3mm, MTF at 50c/mm and 100c/mm was respectively above 0.4 and 0.15 for the object distance from 8m to 0.4m. When the pupil diameter of pseudophakic eye was 4.5mm, MTF at 50c/mm and 100c/mm was respectively above 0.25 and 0.09 for the object distance from 8m to 0.4m.The visual acuity was above 0.9 for the whole visual range at both of two pupil diameters. Therefore it is safe to say that the new MIOL design provides good optical performance for whole visual range under both of the photopic vision and the mesopic vision.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Lai Jiang, Yongji Liu, Xiaolin Wang, Zhaoqi Wang, "Multifocal intraocular lens to correct presbyopia", Proc. SPIE 10021, Optical Design and Testing VII, 1002115 (31 October 2016); doi: 10.1117/12.2245656; https://doi.org/10.1117/12.2245656
PROCEEDINGS
8 PAGES


SHARE
Back to Top