title: An evaluation of Bennett's method for determining the equivalent powers of the eye and its crystalline lens without resort to phakometry.
abstract: Refraction and optical components have been measured in 36 eyes using objective optometry, keratometry, ophthalmophakometry and A-scan ultrasonography. A computing scheme was used to confirm that the accumulated experimental errors for a phakometric technique tend to exceed the inherent errors of a new method which calculates the equivalent powers of the eye and its crystalline lens without resort to phakometry. Bennett's method was shown to be a valuable technique in biometric studies which obviates the need for lengthy experimental investigations.
authors.affiliation: Department of Vision Sciences, Aston University, Birmingham, UK.
authors.forename: M C
authors.initials: MC
authors.lastname: Dunne
authors.forename: D A
authors.initials: DA
authors.lastname: Barnes
authors.forename: J M
authors.initials: JM
authors.lastname: Royston
mesh_terms: D000328:Adult; D000886:Anthropometry; D003315:Cornea / Q000503:physiopathology; D005260:Female; D006801:Humans; D007908:Lens, Crystalline / Q000503:physiopathology*; D008297:Male; D008722:Methods; D055095:Optics and Photonics; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000503:physiopathology*