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R. Sloan Wilson, MD
Little Rock, Ark

Arch Ophthalmol. 1988;106(12):1650.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor.

—I have had difficulty keeping finger traction on contact gonioscopic and fundus lenses during examination and laser treatments. Although some lenses have serrated side edges, the edge of the front surface is often the only area available for traction, particularly in patients with deep-set eyes or protruding orbital rims. Rotating such a lens through pressure on the front of the eye is usually the only way that it can be manipulated. One company (Haig-Streit, Bern, Switzerland) makes a snap-on ring for their lenses that are not serrated and extends several millimeters in front of the lens into the small space between the slit lamp or laser, making their use impractical. I have alleviated some of these problems with a Penrose drain. A small section (approximately 0.5 in [1.27 mm]) of a commonly available Penrose drain (available in 0.25 in [0.635-mm] increments up to 2 in [5.08 mm]) . . . [Full Text PDF of this Article]

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