The Refraction and Accommodation of the Eye and Their AnomaliesPentland, 1886 - 600 pages |
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Page xi
... Concave Spectacle Glasses - Surgical Treatment of Convergence - In- sufficiency Atypic Myopia from Unusual Causes Anisometropia Vision of Anisometropes — Treatment of Anisometropia — Anomalies of Accommodation - Spasm of Accommodation ...
... Concave Spectacle Glasses - Surgical Treatment of Convergence - In- sufficiency Atypic Myopia from Unusual Causes Anisometropia Vision of Anisometropes — Treatment of Anisometropia — Anomalies of Accommodation - Spasm of Accommodation ...
Page 23
... concave mirror . The object L ' is then situated at the point where the convergent rays would be focused if prolonged , i.c. , behind the surface , on the same side of it as the image ( Fig . 11 ) . H FIG . 11 . In order to find the ...
... concave mirror . The object L ' is then situated at the point where the convergent rays would be focused if prolonged , i.c. , behind the surface , on the same side of it as the image ( Fig . 11 ) . H FIG . 11 . In order to find the ...
Page 38
... concave lens ( 5 ) ; 6. The divergent meniscus ( 6 ) . BICONVEX LENS . Let us take a biconvex lens , surrounded by a single medium , and seek to determine its cardinal points , taking as a guide the definition which we have just given ...
... concave lens ( 5 ) ; 6. The divergent meniscus ( 6 ) . BICONVEX LENS . Let us take a biconvex lens , surrounded by a single medium , and seek to determine its cardinal points , taking as a guide the definition which we have just given ...
Page 53
... CONCAVE LENS . The optical centre , the first nodal point and the first principal point , coincide with the summit of the concave surface of the lens . The second nodal point is situated in the interior of the lens , at a distance L " K ...
... CONCAVE LENS . The optical centre , the first nodal point and the first principal point , coincide with the summit of the concave surface of the lens . The second nodal point is situated in the interior of the lens , at a distance L " K ...
Page 55
... concave lens : F jo ' jo " ( n − 1 ) ( 1 ′′ – r ′ ) ` yo yo " ( n − 1 ) ( r ' + r ' " ' ) ; Divergent meniscus : F = - p n 1 - r ′′ ) r ' " ( n − 1 ) ( r ' — r ′′ ) ` In most cases the two surfaces , of the biconvex and biconcave ...
... concave lens : F jo ' jo " ( n − 1 ) ( 1 ′′ – r ′ ) ` yo yo " ( n − 1 ) ( r ' + r ' " ' ) ; Divergent meniscus : F = - p n 1 - r ′′ ) r ' " ( n − 1 ) ( r ' — r ′′ ) ` In most cases the two surfaces , of the biconvex and biconcave ...
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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