 | James Ferguson - 1764 - 322 pages
...a very indiftinct view of the object. This is remedied by placing a convex glafs gh before the eye, which makes the rays converge fooner, and imprints the image duly on the retina at d. Fig. 4. Some eyes require the afliftance of convex glaflef to make them fee If cither the cornea,... | |
 | Benjamin Martin - Science - 1765 - 202 pages
...Pair of Vlfuals with convex Glaffes, or Pebbles, which make the the Rays converge fooner, and imprint the Image duly on the Retina. Every thing hitherto...the Defects thereof, together with their Remedies by Glaffes, are fhewn by the Diffccrtion of the natural Eye, and Experiments ivitb an artificial Eye,... | |
 | James Ferguson - Astronomy - 1776 - 546 pages
...a very indiftindl view of the objedt. This is remedied by placing a convex glafs gb before the eye, which makes the rays converge fooner, and imprints the image duly on the retina at d. If either the cornea, or chryftalline humour, or both of them, be too convex, as in the eye ft... | |
 | John Imison - 1796 - 476 pages
...view of the objeft. This is remedied by placing a convex glals gh, of a proper focus, before the eye ; which makes the rays converge fooner, and imprints the image duly on the retina at d. If either the cornea or chryflalline humour, or both of them, be too convex, as in the eye f,... | |
 | Encyclopedias and dictionaries - 1816 - 778 pages
...diftinct, but beyond the eye as at/. This is remedied by placing a convex plafs gh before the eye, which makes the rays converge fooner, and imprints the image duly on the retina at d. Again, if either the cornea or cryftalline humours, or both, be too convex, as in the eye B,... | |
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This is remedied by placing a convex glafs gb before the eye, which makes the rays converge fooner, and imprints the image duly on the retina at d. If either the cornea, or chryftalline humour, or both of them, be too convex, as in the eye... 