Sight, Light, and Efficiency |
Contents
CHAPTER PAGE | 3 |
II | 20 |
The Extraocular Muscular System | 24 |
Copyright | |
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Common terms and phrases
accommodation and convergence actual ancoramic Angstrom units appear appreciated artificial lighting astigmatism binocular vision brightness contrast cent Chapter ciliary body ciliary muscle ciliary strain cornea curve daylight factor degree of contrast diagram difference of brightness dioptres discrimination distant objects effect efficiency emmetropic esophoria examinee example eyestrain facilitation field fluorescent lamps fluorescent lighting fovea glare glasses grey hypermetropia illumination industrial injury involves lamps lens less letters long-sighted luminance luminous flux machine magnifiers means measured mesoramic movement necessary normal occupations occur ocular oculo-motor operations optical ordinary output perception performance persons practice radiation rectus reflection factor refractive error relative retina retinal image scale seen sensations shade shown in Fig sight standard stereopsis stimulus subtend suitable surface symptoms teloramic test-objects tion usually viewing distance visible visual acuity visual angle visual axes visual capacity VISUAL PERCEPTION visual tasks wavelength work-objects workers