The American journal of the medical sciences (1827)
[Thorofare, N.J., etc.] Charles B. Slack [etc.] · leaf 346
34.6 Loring, Determination of Optical Condition of Eye, etc. [April Proposition Y. For a hypermetropic observer to determine the amount of myopia in the observed eye. — Let A be myopic rays of light coming from a will meet eight inches in front of A's nodal point at d. If B, who is hyper- metropic… … eye being hypermetropic \ is adapted for such rays, they will be brought to a focus on the retina. Consequently A's myopia must be equal to B's hyper- metropia plus the distance, J/= £4- 2 =£. From this it follows that a hyper- metrope of a certain degree can see the fundus of a myope of a certain…
Medicine
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