A Handbook of the diseases of the eye and their treatmentP. Blakiston, Son, 1892 - 318 pages |
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Results 1-5 of 85
Page 3
... latter point is further from the lens the nearer O is to the principal focus , F , until , when O reaches F , F " becomes infinitely distant , and then the rays , after passing through the lens , are parallel . In like manner , F Ө FIG ...
... latter point is further from the lens the nearer O is to the principal focus , F , until , when O reaches F , F " becomes infinitely distant , and then the rays , after passing through the lens , are parallel . In like manner , F Ө FIG ...
Page 9
... latter , but merely a blurred image or circle of diffusion ( at be ) . It is obvious , therefore , that an increase of refracting power in the eye is necessary , in order that near objects may be distinctly seen . It is this increase in ...
... latter , but merely a blurred image or circle of diffusion ( at be ) . It is obvious , therefore , that an increase of refracting power in the eye is necessary , in order that near objects may be distinctly seen . It is this increase in ...
Page 10
... latter . The lens ( 1 ) , which was flattened by the tension of the zonula , is now free to assume a more spherical shape , in response to its own elasticity . The posterior surface of the lens scarcely alters in shape , being fixed in ...
... latter . The lens ( 1 ) , which was flattened by the tension of the zonula , is now free to assume a more spherical shape , in response to its own elasticity . The posterior surface of the lens scarcely alters in shape , being fixed in ...
Page 15
... latter , the difference in dimension between the two angles is very slight . In order to measure the angle y , the eye is placed at the perimeter as for an examination of its field of vision . By means of the corneal reflection of a ...
... latter , the difference in dimension between the two angles is very slight . In order to measure the angle y , the eye is placed at the perimeter as for an examination of its field of vision . By means of the corneal reflection of a ...
Page 27
... latter . The eye , in fact , is put by such a glass in a condition of myopia . Therefore , the strongest convex glass with which a hypermetropic eye can see distant objects ( the test - types ) most distinctly is the glass which ...
... latter . The eye , in fact , is put by such a glass in a condition of myopia . Therefore , the strongest convex glass with which a hypermetropic eye can see distant objects ( the test - types ) most distinctly is the glass which ...
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Common terms and phrases
acuteness of vision affection amblyopia ametropia amplitude of accommodation angle anterior chamber appearance aqueous humor astigmatism atrophy atropine axis bandage become blennorrhoea bulbar capsule cataract cause centre chamber choroid chronic cicatrix ciliary ciliary body color concave conjunctiva convergence convex cornea cure defect dilated diplopia disease distance emmetropic epithelium external rectus eyeball eyelids fibres flap focus forceps foreign body glass glaucoma Graefe's hemianopsia hemorrhages horizontal hypermetropia incision infiltration inflammation iridectomy iris iritis lachrymal latter layers lens lesion liable light macula lutea margin method metres mirror motion muscle myopia normal object occurs opacity operation Ophthal ophthalmia ophthalmoscope optic nerve optic papilla orbital palpebral paralysis passed patient portion posterior prolapse pupil purulent rays refraction result retina sclerotic seen skin sometimes stage strabismus surface surgeon sutures swelling symptoms tarsus tension third nerve tion tissue Treatment tumor ulcer upper lid usually vertical meridian vessels vitreous humor wound
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