constants of the eye

Average dimensions of the various parameters of the eye adopted to represent a typical eye. These vary slightly depending upon the authors, such as Donders, Gullstrand, Bennett-Rabbetts, etc. See reduced eye; schematic eye.

Table C7 Optical constants of an average adult Caucasian eye
structure or surface	refractive index	radius of curvature (mm)	distance from ant. surface of cornea (mm)
cornea	1.376	-	-
aqueous humour	1.336	-	-
lens (total)	1.42	-	-
vitreous humour	1.336	-	-
ant. corneal surface	-	7.8	0
post. corneal surface	-	6.7	0.5
ant. lens surface	-	10.6	3.6
accommodated	-	6.1	3.2
post. lens surface	-	26.2	7.2
accommodated	-	25.3	7.2
retina	1.363	-	24.1