The Illustrated Optical Manual, Or Handbook of Instructions for the Guidance of Surgeons in Testing Quality and Range of Vision, and in Distinguishing and Dealing with Optical Defects in GeneralLongmans, Green, 1888 - 239 páginas |
Dentro del libro
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Página 4
... seen by two eyes its brightness appears to be greater and its tint more saturated than when it is looked at by one eye singly . Owing to the visual perception being thus intensified , the rapidity R OX A FIG . 4. - DIPLOPIA . Images ...
... seen by two eyes its brightness appears to be greater and its tint more saturated than when it is looked at by one eye singly . Owing to the visual perception being thus intensified , the rapidity R OX A FIG . 4. - DIPLOPIA . Images ...
Página 7
... seen through it , it is termed transparent ; if the sub- stance be one like thin porcelain , which permits the passage of light through it , but does not allow objects to be seen through it , it is described as being translucent ...
... seen through it , it is termed transparent ; if the sub- stance be one like thin porcelain , which permits the passage of light through it , but does not allow objects to be seen through it , it is described as being translucent ...
Página 9
... seen at a ' , b ' , and c ′ ) , and finally depict the inverted image ( 1 ) on the retina . branch of optics generally termed dioptrics . The three following laws are constant in all cases of refraction :-( 1 . ) The angle formed by an ...
... seen at a ' , b ' , and c ′ ) , and finally depict the inverted image ( 1 ) on the retina . branch of optics generally termed dioptrics . The three following laws are constant in all cases of refraction :-( 1 . ) The angle formed by an ...
Página 10
... seen by the observer . line in the lower retinal hemisphere ; they are equally reversed in the lateral portions of the retinal picture ; but , nevertheless , all the objects are seen in their real positions and relations to each other ...
... seen by the observer . line in the lower retinal hemisphere ; they are equally reversed in the lateral portions of the retinal picture ; but , nevertheless , all the objects are seen in their real positions and relations to each other ...
Página 11
... seen . The larger the visual angle , the larger the retinal image . If the size of an object remain the same , the visual angle it subtends is increased in proportion as it is brought nearer to the eye ; and hence , the frequently ...
... seen . The larger the visual angle , the larger the retinal image . If the size of an object remain the same , the visual angle it subtends is increased in proportion as it is brought nearer to the eye ; and hence , the frequently ...
Otras ediciones - Ver todas
The Illustrated Optical Manual: Or Handbook of Instructions for the Guidance ... T. Longmore Sin vista previa disponible - 2018 |
The Illustrated Optical Manual, Or Handbook of Instructions for the Guidance ... Thomas Longmore, Sir Sin vista previa disponible - 2016 |
Términos y frases comunes
accommodation acuteness of vision amblyopia ametropia ametropic amount of Acc appear army asthenopia astigmatic eye astigmatism axis binocular vision bull's-eye cause centre ciliary muscle colour colour-blindness concave lens convex lens cornea correcting lens correction Crown 8vo curvature cylindrical lens defect Diagnosis diffusion dioptric diplopia direction distance distant objects distant point distinct vision emmetropic examination exerted exist eye under observation feet focal fundus glasses inches keratoscopy left eye lenses lessened medical officer meridian Mc military service mirror myope myopic neutralised normal acuteness ocular ophthalmoscopic optic parallel rays patient person placed point of distinct power of Acc practice principal focus principal meridians prism rays of light rays proceeding recruit refractive defect refractive power refractive quality regards rendered retina retinal images rifle right eye seen shadow sight soldier spectacles spherical strabismus surgeon target test-dots tion unfit visual acuteness visual angle visual lines
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