| Robert Druitt - 1839 - 456 str.
...as a too great thickness, density, or convexity, of the lenses and humours of the eye, so that the rays of light are brought to a focus before they reach the retina ; or maybe induced by habits of study, and by looking at minute objects, which, by irritating the eye,... | |
| Thomas Turner Tate - 1855 - 442 str.
...the refraction of the light. When the lenses of the eye are too round, or it may be too dense, the rays of light are brought to a focus before they reach the retina ; this takes place with short-sighted people : on the contrary, when the lenses are too flat, or too... | |
| Thomas Turner Tate - 1856 - 264 str.
...the double convex lens, e. When the lenses of the eye are too round, or, it may be, too dense, the rays of light are brought to a focus before they reach the retina ; this takes place with short-sighted people : on the contrary, when the lenses are too flat or too... | |
| Ira Warren - 1859 - 764 str.
...the optic nerve, or retina, — as at o, Fig. 173, instead of at b, where it should be formed. The rays of light are brought to a focus before they reach the retina. SURGICAL DISEASES. It may be remedied frequently by exercising the eyes in looking at distant objects.... | |
| Thomas Turner Tate - 1863 - 284 str.
...to the double convex lens, e. When the lenses of the eye are too round, or it may be, too dense, the rays of light are brought to a focus before they reach the retina ; this takes place with short-sighted people : on the contrary, when the lenses are too flat or too... | |
| Robert Druitt - 1865 - 910 str.
...excitement. SECTION XVn. — SHORT AND LONG SIGHT. 1. SHORT SIGHT, or MYOPIA. — In this affection parallel rays of light are brought to a focus before they reach the retina; and this may be caused either by the refracting power of the eye being too great, or its antero-posterior... | |
| Robert Druitt - 1867 - 730 str.
...in the refractive power of the eye, or else on an elongation of its axis, so that in either case the rays of light are brought to a focus before they reach the retina. The cornea is often exceedingly convex, and the secretion of aqueous humor abundant ; and the crystalline... | |
| 1869 - 392 str.
...dreamed of in your philosophy." — SUAKSFKBE. 126. Wliy are some persons short-sighted ? Because the rays of light are brought to a focus before they reach the retina, and consequently produce an indistinct picture on the retina. This will be more clearly illustrated by... | |
| Henry Haynes Walton - 1875 - 1254 str.
...Muscles of the Eye," and in that on " Squint." MYOPIA, OR SHOKT-SIGHTEDKESS. In myopia, distant or parallel rays of light are brought to a focus before they reach the retina, and the image which is formed on the retina is blurred and indistinct. Only divergent rays, that is, rays... | |
| Richard Dennis Hoblyn - 1878 - 752 str.
...close, w»//, the eve). Pwopsis propincua. Short-sight; near-sight; an affection of the eye, in which parallel rays of light are brought to a focus before they reach the retina, 41 When the distance at which ordinary type can be easily read ¡3 less than twelve inches, the vision... | |
| |