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Books Books 1 - 6 of 6 on ... with that concave glass whose focal length is equal to the distance of the far....
" ... with that concave glass whose focal length is equal to the distance of the far point from the eye, and the converse is true; the measurement of myopia is that concave glass with which the myopic eye sees distinctly objects at a distance, and its focal... "
The Errors of accommodation and refraction of the eye and their treatment - Page 94
by Ernest Clarke - 1903 - 225 pages
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Treatise on the Diseases of the Eye: Including the Anatomy of the Organ

Karl Stellwag von Carion - Eye - 1868 - 774 pages
...a means of more accurate determination, it is well to place before the myopic eye a concave glaaa, whose focal length is equal to the distance of the far point, and then to measure the distance at which the eye, with the glass, can read the text ; for it is difficult...
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Text-book of Ophthalmology

Ernst Fuchs - Eye - 1892 - 788 pages
...The following rule may therefore be enunciated : A myopic eye sees distinctly at infinite distance with that concave glass whose focal length is equal to the distance of the far-point from the eye. And conversely : The focal length of that concave glass with which the myopic...
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Text-book of ophthalmology

Ernst Fuchs - 1899 - 860 pages
...a general law : To see distinctly at infinite distance the hv permetropic eye requires that convex glass whose focal length is equal to the distance of the far point from the eye. Accordingly, the glass that corrects the hypermetropia gives through its focal length at once the position...
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The Encyclopedia Britannica: A Dictionary of Arts, Sciences ..., Volume 28

Hugh Chisholm - Encyclopedias and dictionaries - 1911
...can see distinctly at a distance when the eye is at rest (ie when accommodation is not being used), with that concave glass whose focal length is equal...with which the myopic eye sees distinctly objects at a distance, and its focal length is equal to the distance of the myope's far point from the eye. The...
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The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, Literature and ...

Hugh Chisholm - Encyclopedias and dictionaries - 1911
...can sec distinctly at a distance when the eye is at rest (ie when accommodation is not being used), with that concave glass whose focal length is equal...with which the myopic eye sees distinctly objects at a distance, and its focal length is equal to the distance of the myope's far point from the eye. The...
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Textbook of ophthalmology in the form of clinical lectures, Volume 3

Paul Romer - 1913
...Glasses. The myopic eye sees distinctly at a distance with that concave glass the focal distance of which is equal to the distance of the far point from the eye. Inversely, the focal distance of the concave glass with which the myope sees well at a distance gives...
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