Biomaterial Database

Optics of phakic, pseudophakic, and aphakic eyes: effects on the Stiles-Crawford (SCE I) function. 1993

V Lakshminarayanan, and J E Bailey, and J M Enoch

Allergan Therapeutics, Surgical Clinical Research, Irvine, California.

In many experimental situations one has to work with suitable optical corrections for ocular elements which have been eliminated (lens in aphakia, for example). Analysis of the optics of the total system (eye plus correction and other optical elements) shows substantial changes in the positions of the cardinal points. These changes are meaningful and must be taken into account in subsequent analysis. We discuss the pertinent optical considerations and show as an example the results of measurements of the Stiles-Crawford effect of the first kind in an aphakic subject with spectacle and contact lens correction.

UI	MeSH Term	Description	Entries
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D012160	Retina	The ten-layered nervous tissue membrane of the eye. It is continuous with the OPTIC NERVE and receives images of external objects and transmits visual impulses to the brain. Its outer surface is in contact with the CHOROID and the inner surface with the VITREOUS BODY. The outer-most layer is pigmented, whereas the inner nine layers are transparent.	Ora Serrata
D002387	Cataract Extraction	The removal of a cataractous CRYSTALLINE LENS from the eye.	Enzymatic Zonulolysis,Phakectomy,Cataract Extractions,Enzymatic Zonulolyses,Extraction, Cataract,Extractions, Cataract,Phakectomies,Zonulolyses, Enzymatic,Zonulolysis, Enzymatic
D003261	Contact Lenses	Lenses designed to be worn on the front surface of the eyeball. (UMDNS, 1999)	Lenses, Contact,Contact Lens,Lens, Contact
D005139	Eyeglasses	A pair of ophthalmic lenses in a frame or mounting which is supported by the nose and ears. The purpose is to aid or improve vision. It does not include goggles or nonprescription sun glasses for which EYE PROTECTIVE DEVICES is available.	Glasses,Spectacles,Sun Glasses, Prescription,Glasses, Prescription Sun,Prescription Sun Glasses
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001035	Aphakia	Absence of crystalline lens totally or partially from field of vision, from any cause except after cataract extraction. Aphakia is mainly congenital or as result of LENS DISLOCATION AND SUBLUXATION.	Aphakic Eye,Aphakic Eye, Post-traumatic,Aphakic Eye, Traumatic,Aphakias,Aphakic Eye, Post traumatic,Aphakic Eyes,Aphakic Eyes, Post-traumatic,Eye, Aphakic,Eye, Traumatic Aphakic,Post-traumatic Aphakic Eye,Post-traumatic Aphakic Eyes,Traumatic Aphakic Eye,Traumatic Aphakic Eyes
D012684	Sensory Thresholds	The minimum amount of stimulus energy necessary to elicit a sensory response.	Sensory Threshold,Threshold, Sensory,Thresholds, Sensory
D014796	Visual Perception	The selecting and organizing of visual stimuli based on the individual's past experience.	Visual Processing,Perception, Visual,Processing, Visual