The Dubbelman eye model analysed by ray tracing through aspheric surfaces

Dubbelman and co‐workers have determined intraocular spacings and surface shapes in living eyes by means of corrected Scheimpflug images in a large number of subjects of different age at several levels of accommodation. They give relationships for key anterior segment parameters as a function of age...

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Bibliographic Details
Published in:Ophthalmic & physiological optics 2005-03, Vol.25 (2), p.153-161
Main Author: Norrby, Sverker
Format: Article
Language:English
Subjects:
accommodation
Accommodation, Ocular - physiology
age
Aging - physiology
aspheric
Biological and medical sciences
eye model
Eyeglasses
Humans
Medical sciences
Miscellaneous
Models, Biological
Ocular Physiological Phenomena
Ophthalmology
ray tracing
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Summary:Dubbelman and co‐workers have determined intraocular spacings and surface shapes in living eyes by means of corrected Scheimpflug images in a large number of subjects of different age at several levels of accommodation. They give relationships for key anterior segment parameters as a function of age and level of accommodation. These are used in this paper to build a schematic eye incorporating aspheric surfaces. This eye model is analysed by means of ray tracing with a technique developed for use with a common spreadsheet computer program. The Dubbelman eye model appears to be well corrected for spherical aberration. Compared with measurements on real eyes it agrees well in general, but spherical aberration is negative, while in real eyes it tends to be positive.
ISSN:0275-5408
1475-1313
DOI:10.1111/j.1475-1313.2004.00268.x