Elementary Ophthalmic Optics Including Ophthalmoscopy Retinoscopy
Elementary Ophthalmic Optics Including Ophthalmoscopy Retinoscopy
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In our eReader you can find the full English version of the book. Read Elementary Ophthalmic Optics Including Ophthalmoscopy Retinoscopy Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Elementary Ophthalmic Optics Including Ophthalmoscopy Retinoscopy
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To quickly assess the difficulty of the text, read a short excerpt:
. . • 4 „ 3-6, In accommodation tlie radius of the anterior surface of the lens changes from 10 mm. To 6 mm. , and that of the posterior from 6 mm. To 5-5 mm. (von Helmholtz).
From these data we can determine tlie cardinal points of the cornea and of the lens, and finally of the eye as a whole. Thus the principal points of the cornea coincide at the intersection of the anterior surface with the optic axis. The nodal points coincide at the centre of curvature, and the foci are deduced from (2) a...nd (2a), p. 33. The principal points and nodal points of the lens coincide with each other. The focal distances are equal, since the refractive index of the vitreous is the same as that of the aqueous. These points are determined by the formulas for thick lenses. The cardinal points of the eye as a whole are then deduced, from the combination of the two systems, by the formulie (8) and (9), p. 70.
The following are the results of tliese calculations, and give the measurements of Listing's schematic eye.
What to read after Elementary Ophthalmic Optics Including Ophthalmoscopy Retinoscopy?
You can find similar books in the "Read Also" column, or choose other free books by John Herbert Parsons to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
. . • 4 „ 3-6, In accommodation tlie radius of the anterior surface of the lens changes from 10 mm. To 6 mm. , and that of the posterior from 6 mm. To 5-5 mm. (von Helmholtz).
From these data we can determine tlie cardinal points of the cornea and of the lens, and finally of the eye as a whole. Thus the principal points of the cornea coincide at the intersection of the anterior surface with the optic axis. The nodal points coincide at the centre of curvature, and the foci are deduced from (2) a...nd (2a), p. 33. The principal points and nodal points of the lens coincide with each other. The focal distances are equal, since the refractive index of the vitreous is the same as that of the aqueous. These points are determined by the formulas for thick lenses. The cardinal points of the eye as a whole are then deduced, from the combination of the two systems, by the formulie (8) and (9), p. 70.
The following are the results of tliese calculations, and give the measurements of Listing's schematic eye.
What to read after Elementary Ophthalmic Optics Including Ophthalmoscopy Retinoscopy?
You can find similar books in the "Read Also" column, or choose other free books by John Herbert Parsons to read onlineMoreLess
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