The average eye.
For statistical and other purposes one needs to be able to determine an average eye. An average of refractive errors is readily calculated as an average of dioptric power matrices. A refractive error, however, is not so much a property of the eye as a property of the compensating lens in front of the eye. As such, it ignores other aspects of the optical character of the eye. This paper discusses the difficulties of finding a suitable average that fully accounts for the first-order optics of a set of optical systems. It proposes an average based on ray transferences and logarithms and exponentials of matrices. Application to eyes in particular is discussed.
Harris
W F
WF
Optometric Science Research Group, Department of Optometry, Rand Afrikaans University, P. O. Box 524, Auckland Park, 2006 South Africa. wfh@na.rau.ac.za
D005123:Eye / Q000033:anatomy & histology; D006801:Humans; D008433:Mathematics; D008954:Models, Biological; D009799:Ocular Physiological Phenomena; D055095:Optics and Photonics; D012030:Refractive Errors / Q000503:physiopathology*