Retinal image contrast obtained by a model eye with combined correction of chromatic and spherical aberrations

Kazuhiko Ohnuma,Kazuno Negishi,Takefumi Yamaguchi,Hiroyuki Kayanuma,Toru Noda,Tjundewo Lawu

doi:10.1364/boe.2.001443

Kazuhiko Ohnuma, Kazuno Negishi + Show 4 more

Open Access

https://doi.org/10.1364/boe.2.001443

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Abstract

Correcting spherical and chromatic aberrations in vitro in human eyes provides substantial visual acuity and contrast sensitivity improvements. We found the same improvement in the retinal images using a model eye with/without correction of longitudinal chromatic aberrations (LCAs) and spherical aberrations (SAs). The model eye included an intraocular lens (IOL) and artificial cornea with human ocular LCAs and average human SAs. The optotypes were illuminated using a D65 light source, and the images were obtained using two-dimensional luminance colorimeter. The contrast improvement from the SA correction was higher than the LCA correction, indicating the benefit of an aspheric achromatic IOL.

Highlights

Two types of chromatic aberrations of the ocular optics have been investigated, i.e., transverse chromatic aberrations and longitudinal chromatic aberrations (LCAs)
The image qualities with or without LCAs and transverse chromatic aberrations have been compared with the through-focus image quality for model eyes using a polychromatic metric called the visual Strehl ratio
The results showed that the image quality of the ocular optics with monochromatic aberration was almost unaffected by LCAs, whereas the image quality of the ocular optics without monochromatic aberration was affected more by LCAs

Summary

Introduction

Two types of chromatic aberrations of the ocular optics have been investigated, i.e., transverse chromatic aberrations and longitudinal chromatic aberrations (LCAs). The image qualities with or without LCAs and transverse chromatic aberrations have been compared with the through-focus image quality for model eyes using a polychromatic metric called the visual Strehl ratio. The results showed that the image quality of the ocular optics with monochromatic aberration was almost unaffected by LCAs, whereas the image quality of the ocular optics without monochromatic aberration was affected more by LCAs. Further, the investigators reported a small effect of the transverse chromatic aberrations. The simulated color images of white objects were shown with LCAs and without monochromatic aberrations. The simulated images with LCAs and monochromatic aberrations were not presented

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