The American journal of the medical sciences (1827)
[Thorofare, N.J., etc.] Charles B. Slack [etc.] · leaf 344
of no consequence at all. Proposition III. For a myopic eye to determine the degree of hypermetropic/, in a given case. — Let A represent a hypermetropic eye of | ; rays coming from the fundus of such an eye will diverge as if they came from a point eight inches behind the nodal point at a'. If now… … that is to say, his far point, and as his eye is just adapted for such rays, they will come to a focus on his retina, and he will get a clear view of the fundus without the use of any glass. If the observer's eye is at four inches from the observed eye, then the rays which enter his eye will…
Medicine
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