The Refraction and Accommodation of the Eye and Their AnomaliesPentland, 1886 - 600 pages |
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Page 166
... punctum remotum . During a condition of greatest possible accommodation , on ... proximum . The total accommodative power which an eye can bring into play ... punctum remotum from the eye , the refraction , at rest , is- = 1 R * This is ...
... punctum remotum . During a condition of greatest possible accommodation , on ... proximum . The total accommodative power which an eye can bring into play ... punctum remotum from the eye , the refraction , at rest , is- = 1 R * This is ...
Page 167
Edmond Landolt. If P be the distance between the punctum proximum and the eye , the refraction , in a condition of maximum accommodation , is- P = 1 Р This represents the maximum of refractive power possessed by an eye . The difference ...
Edmond Landolt. If P be the distance between the punctum proximum and the eye , the refraction , in a condition of maximum accommodation , is- P = 1 Р This represents the maximum of refractive power possessed by an eye . The difference ...
Page 168
... punctum remotum , is the lens which corresponds 1 P A to the eye when it is fixing its punctum proximum , and the lens which must be added to the former to obtain the power of the latter -the lens which changes adaptation for the punctum ...
... punctum remotum , is the lens which corresponds 1 P A to the eye when it is fixing its punctum proximum , and the lens which must be added to the former to obtain the power of the latter -the lens which changes adaptation for the punctum ...
Page 169
... punctum proximum , -that is to say , the maximum of refraction of which an eye is susceptible ; and r equals the number of dioptries represented by the eye when it fixes its punctum remotum , -that is to say , when it is at rest , and ...
... punctum proximum , -that is to say , the maximum of refraction of which an eye is susceptible ; and r equals the number of dioptries represented by the eye when it fixes its punctum remotum , -that is to say , when it is at rest , and ...
Page 170
... punctum remotum and the punctum proximum . This latter distance ( RP in Fig . 76 ) , which has been called by Donders the region of accommodation , represents the entire extent controlled by the eye , within which the eye can ...
... punctum remotum and the punctum proximum . This latter distance ( RP in Fig . 76 ) , which has been called by Donders the region of accommodation , represents the entire extent controlled by the eye , within which the eye can ...
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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