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Proceedings Paper

Influence of changes in an eye's optical system on refraction
Author(s): Janina Bartkowska
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Paper Abstract

The optical system of eye is composed of cornea, lens, anterior chamber, and vitreous body. In the standard schematic eye there are 6 refracting surfaces. The changes of the curvature radii, of the distances between them, of the refractive indices influence the ametropia, refractive power of the eye and retinal image size. The influence of these changes can be appreciated by ray tracing or by an analytical method. There are presented simplified formulae for the differentials of ametropia and refractive power of the eye with respect to the surfaces curvatures, refracting power of cornea and lens, refractive indices. The relations are valid too for bigger changes if ametropia is measured in the cornea vertex. The formulae for the differentials with respect to distances, lens translation, eye axis length are valid if ametropia is measured in the object focus of the eye.

Paper Details

Date Published: 22 October 1998
PDF: 6 pages
Proc. SPIE 3579, Ophthalmic Measurements and Optometry, (22 October 1998); doi: 10.1117/12.328305
Show Author Affiliations
Janina Bartkowska, Institute of Applied Optics (Poland)


Published in SPIE Proceedings Vol. 3579:
Ophthalmic Measurements and Optometry
Maksymilian Pluta; Mariusz Szyjer, Editor(s)

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