Optical models of the human cornea and tear film typically employ a single homogeneous cornea with an average refractive index. I propose to use a more realistic multilayer model based on morphological data from the literature. The mathematical methodology to derive the refractive power equation of this model is presented. Special attention is given to the axial gradient index of the refraction structure of the stroma layer because of its optical implications. The importance of considering this multilayer model is quantified in a specific example (orthokeratology) with the help of the derived power equation.
© 2006 Optical Society of America
Vision, Color, and Visual Optics
Original Manuscript: September 20, 2005
Revised Manuscript: December 22, 2005
Manuscript Accepted: January 24, 2006
Vol. 1, Iss. 8 Virtual Journal for Biomedical Optics
Sergio Barbero, "Refractive power of a multilayer rotationally symmetric model of the human cornea and tear film," J. Opt. Soc. Am. A 23, 1578-1585 (2006)