A Compend of the Diseases of the Eye and Refraction Including Treatment and SurgeryP. Blakiston, 1897 - 258 pages |
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Page 18
... takes place often in a degree unappreciable to the human eye . The term opacity is therefore used relatively . i If the light be placed at the center of concavity 18 EXAMINATION AND REFRACTION OF THE EYE . ELEMENTARY OPTICS,
... takes place often in a degree unappreciable to the human eye . The term opacity is therefore used relatively . i If the light be placed at the center of concavity 18 EXAMINATION AND REFRACTION OF THE EYE . ELEMENTARY OPTICS,
Page 22
... DEGREES OF THE REFRACTING ANGLE ( INDEX OF REFRACTION 1.54 ) . Centrads . PRISM - DIOPTERS . REFRACTING ANGLE . IO . 123 ÷ 30 Não o g I. I. 10.00 2.0001 2o.12 3 . 3.0013 3 ° .18 4 . 4.0028 40.23 5.0045 5 ° .28 6.0063 60.32 7 . 7.0115 7 ...
... DEGREES OF THE REFRACTING ANGLE ( INDEX OF REFRACTION 1.54 ) . Centrads . PRISM - DIOPTERS . REFRACTING ANGLE . IO . 123 ÷ 30 Não o g I. I. 10.00 2.0001 2o.12 3 . 3.0013 3 ° .18 4 . 4.0028 40.23 5.0045 5 ° .28 6.0063 60.32 7 . 7.0115 7 ...
Page 30
... degree , and the nearest point from which rays may diverge and yet focus on the retina is called the near point , or punctum proximum . This is found by directing the patient to look at some fine print of a definite measurement , and ...
... degree , and the nearest point from which rays may diverge and yet focus on the retina is called the near point , or punctum proximum . This is found by directing the patient to look at some fine print of a definite measurement , and ...
Page 36
... degree of tension is expressed by the capital letter T. , preceded by a plus sign ( + ) if there is increase ; or preceded by a minus sign ( — ) if there is decrease . The amount of deviation from normal is expressed by numerals ; thus ...
... degree of tension is expressed by the capital letter T. , preceded by a plus sign ( + ) if there is increase ; or preceded by a minus sign ( — ) if there is decrease . The amount of deviation from normal is expressed by numerals ; thus ...
Page 39
... it without the aid of a lens . In low degrees of myopia the image is so small as to be of little practical use . Figure. FIG . 15. - LORING'S OPHTHALMOSCOPE . FIG . 16. - MORTON'S OPHTHALMOSCOPE . FIG . 17. OPHTHALMOSCOPY . 39.
... it without the aid of a lens . In low degrees of myopia the image is so small as to be of little practical use . Figure. FIG . 15. - LORING'S OPHTHALMOSCOPE . FIG . 16. - MORTON'S OPHTHALMOSCOPE . FIG . 17. OPHTHALMOSCOPY . 39.
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Common terms and phrases
2d Edition 4th Edition accommodation acuity affected eye amblyopia ametropia Anatomy angle anterior chamber antiseptic aqueous artery astigmatism atrophy atropin axis bandage called capsule cataract cause chamber choroid ciliary body ciliary muscle Cloth cocain color concave condition conjunctiva convergence cornea correction cylinder degree deviation Diagnosis dilated diopters diplopia direction disc disease distance edge emmetropic entropion eserin examination exophoria eyeball focus foreign body Formulæ fundus glass glaucoma hemorrhage hyperopia hyperopic Illus Illustrations incision increased inflammation iris iritis lacrimal layer lenses Medical Medicine membrane meridian meters mirror muscular mydriasis mydriatic myopia normal object ocular opacity opaque operation ophthalmoscope optic nerve orbit paralysis patient posterior prism prognosis pupil rays of light rectus refraction result retina retinoscope Revised sclera seen side skin solution spheric squint strabismus surface Surgery sutures symptoms tendon tension Therapeutics tion tissue treatment tumor ulcer usually vertical vessels vision visual vitreous wound
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