The Refraction and Accommodation of the Eye and Their AnomaliesPentland, 1886 - 600 pages |
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Page 117
... fixation ; K'O , line of vision ; MO , line of fixation ; OXE , angle a ; O MA , angle y . common with the latter , only the nodal points K ' and K " , where it crosses the optic axis . The visual line is , therefore , a secondary axis ...
... fixation ; K'O , line of vision ; MO , line of fixation ; OXE , angle a ; O MA , angle y . common with the latter , only the nodal points K ' and K " , where it crosses the optic axis . The visual line is , therefore , a secondary axis ...
Page 118
Edmond Landolt. The line OM , which connects the object of fixation with the centre of rotation of the eye , is called the line of fixation . It is not identical with the line of vision , because of the distance which separates the ...
Edmond Landolt. The line OM , which connects the object of fixation with the centre of rotation of the eye , is called the line of fixation . It is not identical with the line of vision , because of the distance which separates the ...
Page 119
... fixation , a third line is known in physiological optics . It passes from the point of fixation through the centre of the pupil , and has been called " Visirlinie " by Helmholtz , line of sight by Knapp ( Arch . of Ophthal , and Otol ...
... fixation , a third line is known in physiological optics . It passes from the point of fixation through the centre of the pupil , and has been called " Visirlinie " by Helmholtz , line of sight by Knapp ( Arch . of Ophthal , and Otol ...
Page 144
... fixation changes its distance . Its refractive power must increase when the object approaches and diminish when the latter recedes . This is , in fact , what takes place . The faculty of the eye , to give its dioptric apparatus the ...
... fixation changes its distance . Its refractive power must increase when the object approaches and diminish when the latter recedes . This is , in fact , what takes place . The faculty of the eye , to give its dioptric apparatus the ...
Page 147
... fixation in the direction A A nearer and nearer to the eye , without the latter ceasing to distinguish it clearly , the following phenomena are observed in the reflected images ( Fig . 64 , B ) : The image ( a ) from the cornea does not ...
... fixation in the direction A A nearer and nearer to the eye , without the latter ceasing to distinguish it clearly , the following phenomena are observed in the reflected images ( Fig . 64 , B ) : The image ( a ) from the cornea does not ...
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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