The Refraction and Accommodation of the Eye and Their AnomaliesPentland, 1886 - 600 pages |
From inside the book
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Page 4
... passing through any number of other media to reach a point C , is exactly the same as that taken by a ray passing from C to A. This is a law with which we shall very frequently have to deal further on . 1 In strict exactness it should ...
... passing through any number of other media to reach a point C , is exactly the same as that taken by a ray passing from C to A. This is a law with which we shall very frequently have to deal further on . 1 In strict exactness it should ...
Page 5
Edmond Landolt. The refraction to which a luminous ray is subjected , in passing from one medium to another , is evidently as much greater as the ray is more deviated from its primitive direction . To express the relation of the ...
Edmond Landolt. The refraction to which a luminous ray is subjected , in passing from one medium to another , is evidently as much greater as the ray is more deviated from its primitive direction . To express the relation of the ...
Page 7
... passing from the air into another medium as coming from a vacuum . Letting v represent the speed of light in a vacuum , v ′ in a medium I , v " in a medium II , the absolute index of refraction of the medium I will be- that of the ...
... passing from the air into another medium as coming from a vacuum . Letting v represent the speed of light in a vacuum , v ′ in a medium I , v " in a medium II , the absolute index of refraction of the medium I will be- that of the ...
Page 8
... passed through all of them , the luminous ray re - enter the first medium : it will then be parallel to its primitive direction . We take , as measure of the refractive power of a substance , the deviation to which a ray of light coming ...
... passed through all of them , the luminous ray re - enter the first medium : it will then be parallel to its primitive direction . We take , as measure of the refractive power of a substance , the deviation to which a ray of light coming ...
Page 14
... passed through at the same distance from its summit will be united at the same point of the axis ; but this point will be nearer the surface in proportion as the rays have passed through it further from its apex . The rays nearest the ...
... passed through at the same distance from its summit will be united at the same point of the axis ; but this point will be nearer the surface in proportion as the rays have passed through it further from its apex . The rays nearest the ...
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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