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Michael A. Kass, MD; David W. Meltzer, PhD, MD; Mae Gordon, PhD
From the Department of Ophthalmology (Drs Kass, Meltzer, and Gordon) and the Division of Biostatistics (Dr Gordon), Washington University School of Medicine, St Louis. Dr Meltzer is now with the Dallas Eye Institute, Duncanville, Tex.

Arch Ophthalmol. 1984;102(10):1550-1554.

Abstract
• We developed an eyedrop medication monitor that electronically records the date and time of each medication administration over a six-week period. It records a medication usage in a 15-minute interval when the cap is removed from the bottle and the bottle is inverted. The electronic components housed inside the bottle weigh 7.5 g, including the batteries, and the total volume of the circuit is 7.5 cc. The monitor resembles commercially available 30-mL eyedrop bottles in size, shape, and weight. The monitor is accurate when tested against known patterns of usage. The electronic eyedrop monitor should be useful in assessing compliance with eyedrop medications.

Footnotes
Accepted for publication June 29, 1984.

Reprint requests to the Department of Ophthalmology, Washington University School of Medicine, 660 S Euclid Ave, St Louis, MO 63110 (Dr Kass).

This study was supported in part by research grant EY 03579 from the National Eye Institute.

The authors have no commercial interest in the device described.

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