Philosophical Transactions of the Royal Society of London, Volume 103W. Bowyer and J. Nichols for Lockyer Davis, printer to the Royal Society, 1813 |
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Pagina 40
... inches from the eye . — In a young lady , seventeen years of age , whose right eye was so near sighted that the apparent lines on the optometer met at two inches and three quarters from the eye , these lines , when the pupil was dilated ...
... inches from the eye . — In a young lady , seventeen years of age , whose right eye was so near sighted that the apparent lines on the optometer met at two inches and three quarters from the eye , these lines , when the pupil was dilated ...
Pagina 41
Royal Society (Great Britain). of two inches with either eye . I do not insist , however , on the present case , because , though there was not any visible opacity in the crystalline , this sometimes exists in a small de- gree without ...
Royal Society (Great Britain). of two inches with either eye . I do not insist , however , on the present case , because , though there was not any visible opacity in the crystalline , this sometimes exists in a small de- gree without ...
Pagina 43
... inches from the cor- nea ; but at the age of fifty - five , he required not only a convex glass of six inches focus , to enable him to bring to a point on the retina rays proceeding from an object seven inches from the eye , but ...
... inches from the cor- nea ; but at the age of fifty - five , he required not only a convex glass of six inches focus , to enable him to bring to a point on the retina rays proceeding from an object seven inches from the eye , but ...
Pagina 44
... inches , and they continue united as far as five inches and a quarter , after which they also separate and diverge ; so that the range of distinct vision in me does not extend further than an inch and a quarter in either eye ; and ...
... inches , and they continue united as far as five inches and a quarter , after which they also separate and diverge ; so that the range of distinct vision in me does not extend further than an inch and a quarter in either eye ; and ...
Pagina 45
... inches radius on one side , and eleven inches on the other , the mean between which is very nearly nine inches . With a glass of this description I can read the smallest print , but to distinguish distant objects I am obliged to look ...
... inches radius on one side , and eleven inches on the other , the mean between which is very nearly nine inches . With a glass of this description I can read the smallest print , but to distinguish distant objects I am obliged to look ...
Overige edities - Alles bekijken
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