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DAVID O. HARRINGTON, MD

Arch Ophthalmol. 1964;72(1):23-28.

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

In 1961, after several years of experimentation, I presented a self-illuminated stimulus for tangent screen perimetry¹ utilizing a white electroluminescent panel lamp which maintains a constant and standardized level of brightness at all times, under all conditions of room and background illumination.

The need for such a stimulus of constant and measured luminance has been recognized for years. It was one of Goldmann's^2,3 prime considerations in designing his perimeter and it prompted me⁴ to develop fluorescent sulfide tangent screen stimuli activated by ultraviolet (black) light which thus become their own source of light.

It has been almost impossible to maintain a constant incandescent illumination on all areas of a 1 or 2 meter tangent screen without resorting to complicated and expensive installations of lights and reflectors. Projection methods for use with tangent screens have not been satisfactory and are also difficult to maintain at a constant level . . . [Full Text PDF of this Article]

Author Affiliations
San Francisco

From the Department of Ophthalmology, University of California School of Medicine.

Footnotes
Read before the Meeting of the Pan Pacific Surgical Association, Honolulu, Nov, 1963.

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