The Refraction and Accommodation of the Eye and Their AnomaliesPentland, 1886 - 600 pages |
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Page x
... Action of Convex Spectacle - Glasses - Secondary Effects of Convex Spectacle Glasses - Effects of Convex Glasses upon Convergence - Influence of Convex Glasses on Convergence Treatment of the Convergent Strabismus of Hyperopes ...
... Action of Convex Spectacle - Glasses - Secondary Effects of Convex Spectacle Glasses - Effects of Convex Glasses upon Convergence - Influence of Convex Glasses on Convergence Treatment of the Convergent Strabismus of Hyperopes ...
Page 69
... action of the lens . However , it is the power of refraction of a lens we want to know , and not its radius . The strength of the lens is , as we have seen , the converse of its focal distance , and this focal distance depends , not ...
... action of the lens . However , it is the power of refraction of a lens we want to know , and not its radius . The strength of the lens is , as we have seen , the converse of its focal distance , and this focal distance depends , not ...
Page 90
... action being expressed by the cardinal points and planes , they have no significance for the construction or calculation of the course of luminous rays through the system . direction , J " L " , will therefore be 90 PHYSICAL PORTION .
... action being expressed by the cardinal points and planes , they have no significance for the construction or calculation of the course of luminous rays through the system . direction , J " L " , will therefore be 90 PHYSICAL PORTION .
Page 108
... action are absolutely independent of the retina ; hence it will be well to commence by studying it separately . After having become acquainted with it , we shall add the re- ceptive and perceptive screen for the images - the retina ...
... action are absolutely independent of the retina ; hence it will be well to commence by studying it separately . After having become acquainted with it , we shall add the re- ceptive and perceptive screen for the images - the retina ...
Page 109
... action of such an apparatus is stronger in proportion as its surfaces are more curved , and as its component substances are more refractive . The exponent of the degree , in which a transparent medium possesses refractive power , is ...
... action of such an apparatus is stronger in proportion as its surfaces are more curved , and as its component substances are more refractive . The exponent of the degree , in which a transparent medium possesses refractive power , is ...
Other editions - View all
The Refraction and Accommodation of the Eye and Their Anomalies Edmond Landolt No preview available - 2023 |
The Refraction and Accommodation of the Eye and Their Anomalies Edmond Landolt No preview available - 2018 |
Common terms and phrases
acuteness of vision adapted ametropia amplitude of accommodation angle anisometropia asthenopia astigmatism atropine axis becomes binocular vision centimetres centre choroid ciliary muscle concave glass convex glass convex lens cornea correcting-glass correction corresponding crystalline lens determine diminished dioptric apparatus dioptric system dioptries diplopia direction distant vision divergent Donders dynamic refraction effort of accommodation emmetropia emmetropic eye equal focal distance formula fundus Hence horizontal hyperopia hyperopic hyperopic eye increase index of refraction infinity inverted Landolt latter lenses less lines of fixation luminous point luminous rays maximum medium metre metre-angles millimetres mydriatic myopes myopia myopic eye nearer nodal point object observed obtain Ophth ophthalmoscope optical optometer patient placed posterior principal focus principal meridians principal point prism produced punctum proximum punctum remotum pupil range of accommodation refractive power refractive surface retina retinal images second principal situated spasm spherical static refraction strabismus tion vertical visual acuteness
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