The Sight and how to Preserve it |
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Page 9
... less blind from the obstruction of the passage of light . MA is a little muscle , called the muscle of accommodation , that adjusts the focus of the lens and the eye for near objects . M C is a muscle attached to the white of the eye on ...
... less blind from the obstruction of the passage of light . MA is a little muscle , called the muscle of accommodation , that adjusts the focus of the lens and the eye for near objects . M C is a muscle attached to the white of the eye on ...
Page 11
... less blurred . When we are looking at a distance , if our eyes are neither near - sighted nor far - sighted ( over- FIG . C. sighted ) , the rays of light that enter the eye are focussed on the retina , as seen in Fig . B , without ...
... less blurred . When we are looking at a distance , if our eyes are neither near - sighted nor far - sighted ( over- FIG . C. sighted ) , the rays of light that enter the eye are focussed on the retina , as seen in Fig . B , without ...
Page 14
... less than a disorder of the accommodative apparatus : or , we may say , a disorder of the two muscles of accommodation and convergence . In health , these two muscles work together in perfect harmony . If either one becomes affected ...
... less than a disorder of the accommodative apparatus : or , we may say , a disorder of the two muscles of accommodation and convergence . In health , these two muscles work together in perfect harmony . If either one becomes affected ...
Page 27
... SIGHT . The remedy for over - sight suggests itself at once . If the eye is too flat , of course a convex glass ( ) makes it less so , practically , and thus removes. CONVEX GLASSES FOR OVER - SIGHT . 27 EYE-GLASSES FOR OVER-SIGHT.
... SIGHT . The remedy for over - sight suggests itself at once . If the eye is too flat , of course a convex glass ( ) makes it less so , practically , and thus removes. CONVEX GLASSES FOR OVER - SIGHT . 27 EYE-GLASSES FOR OVER-SIGHT.
Page 28
Henry Clay Angell. makes it less so , practically , and thus removes the effect of its defective form . Convex glasses in the form of eye - glasses or spectacles are therefore imperative to prevent the development of weak sight as well ...
Henry Clay Angell. makes it less so , practically , and thus removes the effect of its defective form . Convex glasses in the form of eye - glasses or spectacles are therefore imperative to prevent the development of weak sight as well ...
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accommodative power adjusting affection Author becomes Birds BOTANY BRITISH brought called cause clear cloth Coloured Figures Coloured Plates common complete Containing convergence convex glasses course Crown 8vo defect Demy 8vo Descriptions Directions disease distance effort enlarged extra eye-ball fatigue Fcap feet FERNS Figures Fishes FLOWERS focus focussed front gilt give glasses Guide hand HARDWICKE Health Illustrated inches JARDINE JOHN Lecture lens less letters lines List London look means muscle NATURAL HISTORY near-sight nearly necessary noticed numerous numerous Illustrations objects oculist old sight optical over-sight pain person PLAIN Plants Practical PRESERVE Prevention Progress proper Published pupil rays of light reach reading reduced price regard require retina Royal Science Second Edition seen Series sewing SHILLING Species strong super-royal 8vo tion turning usually vision Vols Volumes weak sight Woodcuts
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