The Refraction and Accommodation of the Eye and Their AnomaliesPentland, 1886 - 600 pages |
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Page 15
... produced as by refraction . In order that the homocentric rays may remain homocentric , the surface must have such a ... produce images . It is , however , possible to obtain an image almost reduced to a point , if in producing it one ...
... produced as by refraction . In order that the homocentric rays may remain homocentric , the surface must have such a ... produce images . It is , however , possible to obtain an image almost reduced to a point , if in producing it one ...
Page 33
... produced if we had chosen an object extending below the axis ; its image would be pro- duced on the other side of the axis above L " A " . PASSAGE OF LIGHT THROUGH A SYSTEM MADE UP OF SEVERAL REFRACTING SURFACES . When , after having ...
... produced if we had chosen an object extending below the axis ; its image would be pro- duced on the other side of the axis above L " A " . PASSAGE OF LIGHT THROUGH A SYSTEM MADE UP OF SEVERAL REFRACTING SURFACES . When , after having ...
Page 56
... produced by such a prism is equal for all incidental rays , at whatever inclination they meet the prism . Now biconvex lenses , whose thickness may be disregarded , may be considered as prisms of small angles . Let A B ( Fig . 31 ) be a ...
... produced by such a prism is equal for all incidental rays , at whatever inclination they meet the prism . Now biconvex lenses , whose thickness may be disregarded , may be considered as prisms of small angles . Let A B ( Fig . 31 ) be a ...
Page 104
... produced , its size , the influence exercised upon it by different states of refrac- tion , by correcting glasses , & c . & c . In rendering the eye myopic , or by placing before it a strong convex lens , an inverted image is produced ...
... produced , its size , the influence exercised upon it by different states of refrac- tion , by correcting glasses , & c . & c . In rendering the eye myopic , or by placing before it a strong convex lens , an inverted image is produced ...
Page 108
... produced under the influence of a muscular action ( accommo- dation ) ; this is the " dynamic refraction " of the eye . We shall study it also from the single point of view of the dioptric apparatus at first , and afterwards in its ...
... produced under the influence of a muscular action ( accommo- dation ) ; this is the " dynamic refraction " of the eye . We shall study it also from the single point of view of the dioptric apparatus at first , and afterwards in its ...
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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