The Refraction and Accommodation of the Eye and Their AnomaliesPentland, 1886 - 600 pages |
From inside the book
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Page 99
... der Physiologie , iv . , 473 , and Helmholtz , Handbuch der physiologischen Optik , p . 60 ; Donders , Anomalies of Acc . and Refr . , p . 175 metres behind the anterior surface of the cornea , and. THE REDUCED EYE . 99.
... der Physiologie , iv . , 473 , and Helmholtz , Handbuch der physiologischen Optik , p . 60 ; Donders , Anomalies of Acc . and Refr . , p . 175 metres behind the anterior surface of the cornea , and. THE REDUCED EYE . 99.
Page 100
... Donders has suppressed the decimal fractions , and in this way has arrived at a reduced eye , which is represented in its actual size by Fig . 48 . The following are his optical constants , expressed numerically . He admits as : radius ...
... Donders has suppressed the decimal fractions , and in this way has arrived at a reduced eye , which is represented in its actual size by Fig . 48 . The following are his optical constants , expressed numerically . He admits as : radius ...
Page 102
... Donders ' so considerably reduced eye : they do not , at least , exceed the limits of what is permissible in practice . We feel justified , therefore , in using this eye for purposes of demonstration . Ametropia of curvature is ...
... Donders ' so considerably reduced eye : they do not , at least , exceed the limits of what is permissible in practice . We feel justified , therefore , in using this eye for purposes of demonstration . Ametropia of curvature is ...
Page 103
... Donders ' reduced eye . The reader will now understand the signification and value of this little instrument . Being based upon Donders ' reduced eye , which is itself only the classical simplification of the real eye , our artificial ...
... Donders ' reduced eye . The reader will now understand the signification and value of this little instrument . Being based upon Donders ' reduced eye , which is itself only the classical simplification of the real eye , our artificial ...
Page 105
... Donders , equal to 15 millimetres . = COMBINATION OF THE EYE AND A LENS . 22.5 3 15 2 = = - It very often happens that the luminous rays do not enter the eye directly , but after having passed through a lens . The optical constants of ...
... Donders , equal to 15 millimetres . = COMBINATION OF THE EYE AND A LENS . 22.5 3 15 2 = = - It very often happens that the luminous rays do not enter the eye directly , but after having passed through a lens . The optical constants of ...
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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