I desire to show a simple modification of the Berger loupe, which consists in the attachment to its side of a brass clip to hold the small flashlight, which has the appearance and size of a stylographic pen. The light has a small, one-cell battery, which illuminates a tungsten filament lamp, and has a permanent turn-on arrangement. It can be purchased at any of the electrical supply houses, or instrument shops.
The light rays from the lamp are projected toward the focal point of the Berger loupe, and give sufficient light to illuminate satisfactorily the eye under examination. It has been of especial value, however, in the removal of foreign bodies from the cornea, and in pulling out delicate misplaced cilia from the eyelids, as it gives an independent source of illumination, and leaves both hands free for manipulation of the eyespud, and for holding the patient's eyelids. It has
Shumway EA. A SELF-ILLUMINATED BERGER LOUPE. JAMA. 1915;LXV(16):1363. doi:10.1001/jama.1915.25810160001016a
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