PMID: 9848838Dec 16, 1998

Modeling human eye aberrations and their compensation for high-resolution retinal imaging

Optometry and Vision Science : Official Publication of the American Academy of Optometry
L ZhuY Fainman

Abstract

We introduced a mathematical eye model using Gullstrand's six-surface eye model modified by clinically measured aspherical data to study human eye aberrations and their compensation for high-resolution retinal imaging. Ray tracing was used to characterize aberrations and point spread functions (PSFs) of the eye model. By using the Zernike polynomial decomposition of the calculated pupil function, we quantified the wavefront aberrations. Based on calculated PSFs, we designed optical inverse filters to reduce the aberrations for a large pupil size and improve the resolution. Spherical aberration and oblique astigmatism were found to be in good agreement with published experimental measurements. Spherical aberration and defocus were the most significant aberrations for on-axis imaging, whereas oblique astigmatism and coma combined with spherical aberration and defocus were most significant for off-axis imaging. The best retinal image resolution occurred at 2- to 3-mm pupil diameter. After aberration correction for an 8-mm diameter pupil, the resolutions for on-axis or 9 degrees off-axis imaging points were very close to diffraction-limited resolutions. Over a limited field of view (FOV), retinal image resolution of the eye model c...Continue Reading

Citations

Mar 20, 2004·Journal of Cataract and Refractive Surgery·Shin-ichi AoshimaAkira Minakata
Dec 11, 2002·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·D Robert IskanderLeo G Carney
Feb 6, 2003·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·George Smith
Jul 19, 2005·The British Journal of Ophthalmology·D U BartschW R Freeman
Jan 25, 2003·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Salvador Bara, Rafael Navarro
Nov 17, 2007·Optics Letters·Stephen A BurnsSalvador Bara
Aug 15, 2002·Journal of Biomedical Optics·Dirk-Uwe BartschW R Freeman

Related Concepts

Astigmatism
In Silico
Ocular Refraction
Retina
Photonics

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