The Refraction and Accommodation of the Eye and Their AnomaliesPentland, 1886 - 600 pages |
From inside the book
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Page v
... optical instrument is being constantly brought to our notice ; we read it everywhere , we hear it discussed on all ... optical con- struction and their functions is indispensable . Facts confirm our conclusions . At least two - thirds of ...
... optical instrument is being constantly brought to our notice ; we read it everywhere , we hear it discussed on all ... optical con- struction and their functions is indispensable . Facts confirm our conclusions . At least two - thirds of ...
Page x
... Optical Adaptation in Binocular Vision - Relative Range of Accommodation and Convergence , - PAGE 219-290 CHAPTER IV . ASTIGMATISM . Regular Astigmatism - Seat of Regular Astigmatism - Regular Astigmatism in its Relations to the General ...
... Optical Adaptation in Binocular Vision - Relative Range of Accommodation and Convergence , - PAGE 219-290 CHAPTER IV . ASTIGMATISM . Regular Astigmatism - Seat of Regular Astigmatism - Regular Astigmatism in its Relations to the General ...
Page 4
... optical point of view , between denser and rarer media . In the former the light is propagated less rapidly , in the latter more rapidly . When a luminous ray passes from a rarer into a denser medium , it is deviated toward a ...
... optical point of view , between denser and rarer media . In the former the light is propagated less rapidly , in the latter more rapidly . When a luminous ray passes from a rarer into a denser medium , it is deviated toward a ...
Page 31
... optic axis . 1. The point of intersection of the surface with the optic axis . This is called the principal point ; we give it the sign H. We term the plane passed through the principal point , perpen- dicularly to the optic axis , the ...
... optic axis . 1. The point of intersection of the surface with the optic axis . This is called the principal point ; we give it the sign H. We term the plane passed through the principal point , perpen- dicularly to the optic axis , the ...
Page 36
... optical instruments , but not in the eye ) , the two principal focal distances are equal , and the principal points coincide with the nodal points . As soon as we know the cardinal points of a dioptric system , it is easy to calculate ...
... optical instruments , but not in the eye ) , the two principal focal distances are equal , and the principal points coincide with the nodal points . As soon as we know the cardinal points of a dioptric system , it is easy to calculate ...
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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