Scheme for the calculation of ocular components in a four-surfaced eye without need for measurement of the anterior crystalline lens surface Purkinje images.
The computing scheme described in this paper allows calculation of the internal radii of the human eye on the assumption that it possesses four (two corneal and two lenticular) axially aligned spherical surfaces separated by homogeneous optical media. It involves measurement of Purkinje images I, II and IV. This approach is novel in that it accounts for the contribution of the posterior corneal surface and does not require measurement of the Purkinje images arising from the anterior crystalline lens surface which are notoriously poor in quality.
Dunne
M C
MC
Department of Vision Sciences, Aston University, Aston Triangle, Birmingham, UK.
D000886:Anthropometry / Q000379:methods; D003315:Cornea / Q000502:physiology; D005123:Eye / Q000033:anatomy & histology*; D006801:Humans; D007908:Lens, Crystalline / Q000033:anatomy & histology; D008433:Mathematics; D012029:Refraction, Ocular