The mean shape of the human cornea
The anterior surface of the cornea is the major refracting element in the human eye. Knowledge of its shape and the variation of this shape throughout the population are important in calculations of the corneal contribution to ocular aberrations. Since the cornea is the surface on which the contact lens rests, the corneal shape is also of importance in contact lens design. this paper presents results of the fitting of a conicoid equation to corneal shape data derived from a precision photokeratoscope. Both rotationally symmetric and non rotationally symmetric form of the conicoid equation were developed. The results show that if the cornea is regarded as a rotationally symmetric conicoid, the conicoid is ellipsoidal but with insufficient asphericity to eliminate spherical aberration for distance vision. More importantly, the results show that the cornea is significantly asymmetric in both radius of curvature and asphericity
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|Item Type:||Journal Article|
|Additional Information:||Now published as Journal of Modern Optics. For more information, please refer to the journal’s website (see link) or contact the author. Author contact details: firstname.lastname@example.org|
|Subjects:||Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)|
|Divisions:||Current > QUT Faculties and Divisions > Faculty of Health|
|Copyright Owner:||Copyright 1982 Taylor & Francis|
|Copyright Statement:||First published in Optica Acta 29(8):pp. 1027-1040.|
|Deposited On:||02 Jan 2007|
|Last Modified:||15 Jan 2009 06:54|
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