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January 1940


Arch Ophthalmol. 1940;23(1):164-165. doi:10.1001/archopht.1940.00860130178014

A transilluminator in order to be completely satisfactory for use on both the anterior and the posterior segment of the eye should have the following properties: (1) small size; (2) light weight; (3) freedom from heat; (4) ease of sterilization; (5) focal light of variable intensities, and (6) atraumatic construction, i. e., a smooth surface and a design based on the anatomic structure of the region.

Finding no such instrument already available, we designed one. It consists of two tips, one curved, of methyl methacrylate (called lucite by du Pont) mounted for focusing before a powerful prefocused bulb in a "penlight" handle and connected to the power supply by a detachable cord (fig. 1).

The tips are cylindric, polished rods 5 mm. in diameter. The end of each rod which is placed in the mounting near the light source is ground and polished to a convex collimating surface, thereby refracting the incident rays

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