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February 1957

A Fixation Light for Tonometry and Tonography

Author Affiliations

From the Ophthalmology Research Laboratory (Dr. I. H. Leopold, Director), Albert Einstein Medical Center, Northern Division. The method described was developed during a study on tonography supported by a research grant from the Weinstock Fund.

AMA Arch Ophthalmol. 1957;57(2):288-289. doi:10.1001/archopht.1957.00930050298023

The desirability of providing the patient with a fixation target during tonometry is well known. With the patient's eyes in a more or less steady position, the risk of corneal abrasion is minimized and the examiner may expect more trustworthy readings. For tonography examinations, proper fixation by the patient is all the more important.

Some ophthalmologists have a small ceiling light mounted in their offices above the examining table. This is generally satisfactory, but it does not provide the flexibility which is often necessary in getting the patient to maintain the most desirable position of the eyes. In some clinics, a painted ball or other fixation target is held directly above the patient by means of an adjustable stand. This has the minor disadvantage that the fear of the object's falling may occasionally disturb a patient and interfere with relaxation.

After a number of possible arrangements were tried, a simple

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