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Raamatud Books 1 - 6 of 6 on These experiments prove that the points of the refracting meridians are not symmetrically....
" These experiments prove that the points of the refracting meridians are not symmetrically arranged around one axis. The asymmetry is of such a nature that the focal distance is shorter in the vertical meridian than in the horizontal. In order, namely,... "
On the Anomalies of Accommodation and Refraction of the Eye: With a ... - Page 452
by Franciscus Cornelis Donders, William Daniel Moore - 1864 - 635 lehte
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Lectures on the Theory and Practice of the Ophthalmoscope

Henry Wilson - 1868 - 148 lehte
...points of the refracting meridkns are not symmetrically arranged around one axis. The asymmetry is of such a nature that the focal distance is shorter...to a focus on the retina : it is not necessary that these diverging in a vertical plane should also previously converge into one point, as the diffusion-images...
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On Long, Short, and Weak Sight: And Their Treatment, by the Scientific Use ...

John Soelberg Wells - 1869 - 248 lehte
...points of the refracting meridians are not symmetrically arranged around one axis. The asymmetry is of such a nature that the focal distance is shorter...each point of the line, must be brought to a focus upon the retina ; it is not necessary that those diverging in a vertical plane should also previously...
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A Treatise on the Diseases of the Eye

John Soelberg Wells - 1869 - 741 lehte
...points of the refracting meridians are not symmetrically arranged around one axis. The asymmetry is of such a nature that the focal distance is shorter...each point of the line, must be brought to a focus upon the retina ; it is not necessary that those diverging in a vertical plane should also previously...
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A Treatise on the Diseases of the Eye

John Soelberg Wells - 1869 - 741 lehte
...points of the refracting meridians are not symmetrically arranged around one axis. The asymmetry is of such a nature that the focal distance is shorter...horizontal plane diverge from each point of the line, must he hronght to a focus upon the retina ; it is not necessary that those diverging in a vertical plane...
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On Long, Short, and Weak Sight

John Soelberg Wells - 1873 - 254 lehte
...not symmetrically arranged around one axis. The asymmetry is of such a nature that the focal dfstance is shorter in the vertical meridian than in the horizontal....each point of the line, must be brought to a focus upon the retina ; it is not necessary that those diverging in a vertical plane should also previously...
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A Practical Treatise on the Diseases of the Eye

Henry Haynes Walton, Arthur Trehern Norton, Thomas Clifford Allbutt - 1875 - 1188 lehte
...In order to see the vertical line acutely, the rays which diverge from it in a horizontal direction must be brought to a focus on the retina. It is not necessary that those diverging in a vertical direction should also converge into one point, as the diffusion-images still existing in a vertical...
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