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The ophthalmoscopic examination is made with less effort and therefore with less fatigue on the part of the patient if it is possible to orient oneself immediately. When the eye is so placed that the ophthalmologist looks straight through the pupil at the optic nerve head he can quickly make his study. The purpose of the procedure that I use is to enable the patient to place his eye in the position of choice and to make it easier for him to keep his eye in this position.
One enounters little difficulty in making the ophthalmoscopic examination of many patients when using the routine directions, namely, asking the patient to look straight ahead, to look slightly to the right or to the left, to look at the ceiling or to look at some object. However, the patient may find difficulty in following such directions, especially when the examiner's
Shield JA. AN AID TO FACILITATE THE OPHTHALMOSCOPIC EXAMINATION. Arch Ophthalmol. 1937;17(5):893–894. doi:10.1001/archopht.1937.00850050141010