The Refraction and Accommodation of the Eye and Their AnomaliesPentland, 1886 - 600 pages |
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Page 16
... determine in which direction a given ray LA is deviated ; and where the refracted ray meets the axis , all rays emanating from L ' will be focused , and the image of L ' will be at this point . To find the direction followed by the ray ...
... determine in which direction a given ray LA is deviated ; and where the refracted ray meets the axis , all rays emanating from L ' will be focused , and the image of L ' will be at this point . To find the direction followed by the ray ...
Page 38
... determine its cardinal points , taking as a guide the definition which we have just given . We shall call— The index of refraction of the ambient medium , The index of refraction of the lens , The radius of curvature of the first ...
... determine its cardinal points , taking as a guide the definition which we have just given . We shall call— The index of refraction of the ambient medium , The index of refraction of the lens , The radius of curvature of the first ...
Page 50
... determined by the same formulæ and by the same construction as in the case of the biconvex lens.1 THE BICONCAVE LENS . CARDINAL POINTS OF THE BICONCAVE LENS . The cardinal points of the biconcave lens are determined in the same way as ...
... determined by the same formulæ and by the same construction as in the case of the biconvex lens.1 THE BICONCAVE LENS . CARDINAL POINTS OF THE BICONCAVE LENS . The cardinal points of the biconcave lens are determined in the same way as ...
Page 54
... determined by the same formulæ as those of the biconvex and biconcave lenses ( 11 , 12 , 13 and 14 ) . However , taking into account the signs of fi , fi " , f , and f " , the expression for- 1 2 S'O = a , becomes positive ; S " Ob ...
... determined by the same formulæ as those of the biconvex and biconcave lenses ( 11 , 12 , 13 and 14 ) . However , taking into account the signs of fi , fi " , f , and f " , the expression for- 1 2 S'O = a , becomes positive ; S " Ob ...
Page 55
... foci , which we have indicated above as serving to determine the place where the image of a point is formed , are the same , for infinitely thin , as for thick lenses . The distances a and b , as well as F , INFINITELY THIN LENSES . 55.
... foci , which we have indicated above as serving to determine the place where the image of a point is formed , are the same , for infinitely thin , as for thick lenses . The distances a and b , as well as F , INFINITELY THIN LENSES . 55.
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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