The Refractive and Motor Mechanism of the Eye |
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The Refractive and Motor Mechanism of the Eye (Classic Reprint) William Norwood Souter No preview available - 2016 |
Common terms and phrases
abduction action ametropia anisometropia appear asthenopia astigmia asymmetry axial b₁ binocular vision choroid ciliary muscle concave lens condition conjugate convergence convex lens cornea correcting lens corresponding crystalline lens curvature cycloplegia cycloplegic cylindrical lens defect degree determined deviation diopter dioptric diplopia direction disk displacement distant vision divergence Donders effect emmetropia emmetropic equation esophoria examined eye external rectus eyeball false image focal distance focal length glasses greater Helmholtz horizontal hyperopia hyperopic illumination increase Landolt lenses lesion light measured meridian of greatest meter method mirror movement muscular myopia nerve nodal point normal eye object oblique occurs ocular muscles Ophthal ophthalmometer ophthalmoscope parallel paralysis pencil placed plane point of reversal position posterior surface principal focus principal meridians prism pupil radius rays recti reflected Refraction and Accommodation refractive error result retina retinal image rotation sclera skiascopy spherical lens staphyloma strabismus symptoms tion Tscherning vertical meridian visual lines wave
Popular passages
Page 23 - The sine of the angle of incidence bears a constant ratio to the sine of the angle of refraction.
Page 350 - Sent postpaid to any part of the world on receipt of price $2.50 PUBLISHED BY THE KEYSTONE PUBLISHING CO.
Page 350 - ... Prism-Dioptry. Why Strong Contra-Generic Lenses of Equal Power Fail to Neutralize Each Other. The Advantages of the Sphero-Toric Lens. The Iris, as Diaphragm and Photostat. The Typoscope. The Correction of Depleted Dynamic Refraction (Presbyopia). PRESS NOTICES OF THE ORIGINAL EDITION : OPHTHALMIC LENSES " The work stands alone, in its present form, a compendium of the various laws of physics relative to this subject that are so difficult of access in scattered treatises.
Page 351 - BOUND IN SILK CLOTH Sent postpaid to any part of the world on receipt of price $1.00 (4s.
Page 348 - Illustrations. Sent postpaid to any part of the world on receipt of price $2.50 (10s.
Page 47 - ... image can be formed on that side of the lens, but if an eye at E, receive these rays they will produce the same effect as if they came from A'.
Page 350 - On the Practical Execution of Ophthalmic Prescriptions involving Prisms. A Problem in Cemented Bifocal Lenses, Solved by the Prism-Dioptry. Why Strong Contra-Generic Lenses of Equal Power Fail to Neutralize Each Other. The Advantages of the Sphero-Toric Lens. The Iris, as Diaphragm and Photostat. The Typoscope. The Correction of Depleted Dynamic Refraction (Presbyopia). Press Notices on the Original Edition: OPHTHALMIC LENSES "The work stands alone, in its present form, a compendium of the various...
Page 164 - ... the movement of the lens. The reverse is true regarding a minus lens which is made up of an aggregate of prisms apex toward the optical center and base toward the periphery. Therefore when a minus lens is moved back and forth before the eye objects appear to move in the same direction as the movement of the lens, or, as it is usually expressed, "with
Page 107 - Cramer has succeeded in determining on the living eye the curved ray of the cornea, and of the two surfaces of the crystalline lens.
Page 73 - Discontent with its workings undoubtedly existed in the early part of the nineteenth century, but it was not until the period following the Civil War that State and local taxation acquired the status of a