The American journal of the medical sciences (1827)
[Thorofare, N.J., etc.] Charles B. Slack [etc.] · leaf 328
, that the observ- er's eye is also in a state of rest. If, however, the observer is unable to relax his accommodation entirely, it is evident that the parallel rays entering his eye must come to a focus in front of the retina, that is to say, rays coming from the point a (Fig. 1) will no longer… … The reason of this is that IPs eye — as has been formerly explained — though emmetropic while looking at distant objects, is, as far as ophthal- moscopic examinations are concerned — since he cannot relax his accommo- dation— virtually myopic, and a concave glass (g) must be used behind the…
Medicine
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