Functional nervous diseasesAppleton, 1887 - 217 pages |
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Page 22
... well known to oculists , may be less familiar to those not specially engaged in ex- amining the defects of vision . When rays of light fall upon the transparent sur- face 22 FUNCTIONAL NERVOUS AFFECTIONS . The Eye as an Irritating Cause.
... well known to oculists , may be less familiar to those not specially engaged in ex- amining the defects of vision . When rays of light fall upon the transparent sur- face 22 FUNCTIONAL NERVOUS AFFECTIONS . The Eye as an Irritating Cause.
Page 23
... rays must unite at the focus of the eye , which is the reti- na . To this end , the rays are refracted as they pass through the media . In the normal eye the refractive power is such that parallel rays , rays from objects at infinite ...
... rays must unite at the focus of the eye , which is the reti- na . To this end , the rays are refracted as they pass through the media . In the normal eye the refractive power is such that parallel rays , rays from objects at infinite ...
Page 25
... certain well - under- stood anomalies with the ideal , or , as it is called , the emmetropic eye . In the emmetropic eye parallel rays are so refract- ed that , without an effort on the part of FUNCTION OF ACCOMMODATION . 25.
... certain well - under- stood anomalies with the ideal , or , as it is called , the emmetropic eye . In the emmetropic eye parallel rays are so refract- ed that , without an effort on the part of FUNCTION OF ACCOMMODATION . 25.
Page 26
... rays to a focus at the retina . In such an eye the rays , if permitted to pass beyond the retina , would unite in a focus behind it . In such an eye , clear vision can only be obtained by giving to the rays a greater re- fraction than ...
... rays to a focus at the retina . In such an eye the rays , if permitted to pass beyond the retina , would unite in a focus behind it . In such an eye , clear vision can only be obtained by giving to the rays a greater re- fraction than ...
Page 27
... rays refracted in the same manner as in the emmetropic eye cross before reaching the retina . Cir- cles of diffusion take the place of distinct images when distant objects are to be viewed , and , except for ob- jects brought within the ...
... rays refracted in the same manner as in the emmetropic eye cross before reaching the retina . Cir- cles of diffusion take the place of distinct images when distant objects are to be viewed , and , except for ob- jects brought within the ...
Common terms and phrases
accommodation aches adducting power affections anomalies apoplexy asthenopia atropine attacks Bright's disease brother died cause chorea chronic ciliary muscle Cloth complaint continued convex correction crystalline lens Cured cylindrical glass degree died of Bright's died of consumption died of fever diplopia distance emmetropic epilepsy epileptic esophoria examined external recti muscles families Father died frequently head headaches heart-disease hereditary hypermetropia hyperopia hyperopic hyperphoria improved insane instances insufficiency internal irritation known less manifest Medical mental metre metropia migraine months mother died muscular myopia myopic astigmatism nerve nervous diseases nervous energy Neural neuralgia neurasthenia neuroses occurred ocular conditions ocular defects ocular muscles oculists pain parallel rays patient permanent physician presbyopia prism ralgia recti muscles rectus refractive error relief Result of treatment retina sclera seen shown sister died slight spherical strabismus suffered symptoms tendency tendon tenotomy thenia tion twenty feet vision visual lines weeks
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