Duke-Elder's Practice of RefractionPresents the theory and practice of the correction of defects in the optical system of the eyes and their associated muscles. Includes coverage of contact lenses, methods of objective testing, lens implantation after cataract surgery, and contrast sensitivity testing for visual acuity. |
Contents
The clinical importance of | 3 |
The principles of refraction | 11 |
The refraction of the | 29 |
Copyright | |
20 other sections not shown
Common terms and phrases
accommodation ametropia amount amplitude anisometropia anomalies aphakia aphakic appears astigmatism atropine axes axial axis becomes bifocal binocular vision blurred cataract ciliary muscle clinical concave condition considerable contact lens convergence convex lens cornea correction curvature cyclophoria cycloplegia cycloplegic cylinder defect degree deviation diameter dioptres dioptric diplopia direction distance distant vision divergent effect emmetropia emmetropic examination exophoria eye-strain focal frequently front fundus fusion glass heterophoria horizontal hypermetropia illumination increase indicate lens wear measured meridian metre mirror movement myope myopia nearer neutralisation normal object oblique occurs ocular ophthalmoscope optic zone parallel rays patient peripheral physiological plane position posterior presbyopia presbyopic principal focus prism produced pupil rays of light reading reflex refractive error refractive power relative retina retinal image retinoscopy rotation seen soft lens spectacle lenses sphere spherical squint surface symptoms technique test types treatment trial frame usually vertical visual acuity wherein