The Refraction and Accommodation of the Eye and Their AnomaliesPentland, 1886 - 600 pages |
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Page 4
... diminished according to the nature of the second medium . When the ray falls upon the surface at any other than a right angle , it is deviated from its primitive direction , though remaining in the same plane - the plane of incidence ...
... diminished according to the nature of the second medium . When the ray falls upon the surface at any other than a right angle , it is deviated from its primitive direction , though remaining in the same plane - the plane of incidence ...
Page 68
... diminished the divergence until it became entirely annulled at the instant when the lenses neutralised each other . Continuing to withdraw the convex lens , the rays become more and more convergent . Giving the desired values to the ...
... diminished the divergence until it became entirely annulled at the instant when the lenses neutralised each other . Continuing to withdraw the convex lens , the rays become more and more convergent . Giving the desired values to the ...
Page 112
... diminishes gradually toward the periphery . This form is more favourable to the formation of distinct retinal images than if the cornea were exactly spherical ( vide Chapter I. , pp . 12 and 13 ) . The radius of curvature of the central ...
... diminishes gradually toward the periphery . This form is more favourable to the formation of distinct retinal images than if the cornea were exactly spherical ( vide Chapter I. , pp . 12 and 13 ) . The radius of curvature of the central ...
Page 113
... diminish spherical aberration , i.e. , to permit the formation of distinct images even by rays which enter the eye at a considerable angle with the optic axis . A homogenous lens - a glass one , for instance - brings to a single focus ...
... diminish spherical aberration , i.e. , to permit the formation of distinct images even by rays which enter the eye at a considerable angle with the optic axis . A homogenous lens - a glass one , for instance - brings to a single focus ...
Page 118
... diminish together , and differ less from each other in 1 Helmholtz , loc . cit . , p . 70 of the original ; Donders , loc . cit . , pp . 184 and 248 ; Woinow , Ophthalmometrie , p . 48 ; Mauthner , loc . cit . , pp . 61 and 589 ...
... diminish together , and differ less from each other in 1 Helmholtz , loc . cit . , p . 70 of the original ; Donders , loc . cit . , pp . 184 and 248 ; Woinow , Ophthalmometrie , p . 48 ; Mauthner , loc . cit . , pp . 61 and 589 ...
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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