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 42
... consequence of which the eye , from a want of the usual support behind , is brought , by the pressure of the muscles on its sides , into a kind of oval figure , in which state the retina is removed to its due focal distance from the ...
... consequence of which the eye , from a want of the usual support behind , is brought , by the pressure of the muscles on its sides , into a kind of oval figure , in which state the retina is removed to its due focal distance from the ...
Pagina 44
... consequence of which such persons seldom make use of glasses when they are walking : and the inconvenience of glasses is particularly experienced when they descend a flight of steps , or pass over uneven ground . Near sighted persons do ...
... consequence of which such persons seldom make use of glasses when they are walking : and the inconvenience of glasses is particularly experienced when they descend a flight of steps , or pass over uneven ground . Near sighted persons do ...
Pagina 47
... consequence of his being near sighted , were double concaves of the fifth number , and ground to a radius of eleven inches on each side . These did not as- sist her in looking at near objects , but by their aid she saw much more ...
... consequence of his being near sighted , were double concaves of the fifth number , and ground to a radius of eleven inches on each side . These did not as- sist her in looking at near objects , but by their aid she saw much more ...
Pagina 49
... consequence of the long continuance of the infirmity , and partly on account of her not having abstained with equal steadiness from the occasional use of them . From the preceding statement , the following inferences may be deduced ...
... consequence of the long continuance of the infirmity , and partly on account of her not having abstained with equal steadiness from the occasional use of them . From the preceding statement , the following inferences may be deduced ...
Pagina 50
... consequence of which the sides of the eye collapse , and its axis , from the cornea to the retina , is lengthened ; by which alteration the length of this axis is brought into the same proportion to the flattened state of the cornea or ...
... consequence of which the sides of the eye collapse , and its axis , from the cornea to the retina , is lengthened ; by which alteration the length of this axis is brought into the same proportion to the flattened state of the cornea or ...
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