The Refraction and Accommodation of the Eye and Their AnomaliesPentland, 1886 - 600 pages |
From inside the book
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Page 14
... axis of the sphere . The same phenomenon which we have observed above this ray is also observable below it , and in every plane passed through the line LV . Causing the surface to revolve about LV as an axis , all rays that meet it at ...
... axis of the sphere . The same phenomenon which we have observed above this ray is also observable below it , and in every plane passed through the line LV . Causing the surface to revolve about LV as an axis , all rays that meet it at ...
Page 15
... axis , forming together the focal line . In the paraboloid of revolution all the circles form their images at the same point . Thus the focal line is reduced to a point . We seldom have to deal with parabaloid surfaces , however . We ...
... axis , forming together the focal line . In the paraboloid of revolution all the circles form their images at the same point . Thus the focal line is reduced to a point . We seldom have to deal with parabaloid surfaces , however . We ...
Page 16
... axis . We may already say that the image must be situated on this line , since it is one of the rays of the pencil given off from L ' , which undergoes no deviation , because it strikes the surface at right angles . It remains only to ...
... axis . We may already say that the image must be situated on this line , since it is one of the rays of the pencil given off from L ' , which undergoes no deviation , because it strikes the surface at right angles . It remains only to ...
Page 25
... axis , i.e. , upon the line which passes through this point and the centre of curvature of the surface , forms its image L " at the distance f " from the latter . L A FIG . 12 . B " Another luminous point A ' ( Fig . 12 ) , situated at ...
... axis , i.e. , upon the line which passes through this point and the centre of curvature of the surface , forms its image L " at the distance f " from the latter . L A FIG . 12 . B " Another luminous point A ' ( Fig . 12 ) , situated at ...
Page 26
... axis L'L " , and , passing through L ' , will thus form their images in a plane perpendi- cular to the axis , and passing through the point L " . Hence a plane object , perpendicular to the optic axis , and situated at the distance f ...
... axis L'L " , and , passing through L ' , will thus form their images in a plane perpendi- cular to the axis , and passing through the point L " . Hence a plane object , perpendicular to the optic axis , and situated at the distance f ...
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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