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Mirror-hat device as a drop delivery aid: a pilot study
M Hermina Strungaru1, Jonathan Peck2, Emma C Compeau3
1Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto.
Objective:
To evaluate the effectiveness of a novel mirror-hat drop delivery aid.
Design:
Prospective, observational study.
Participants:
Sixty eyes from 30 subjects with primary open-angle glaucoma or ocular hypertension attending the glaucoma unit at the Toronto Western Hospital.
Methods:
The mirror-hat device consists of a magnifying mirror attached to a brimmed cap. The aid was provided to subjects who self-administered topical antiglaucoma medications. Drop instillation technique (time taken to instill a drop, number of drops dispensed, drop contact location, and contamination of bottle tip) was evaluated with and without the device. Subjects also completed a survey regarding drop administration and satisfaction with the device.
Results:
Subjects were less likely to contaminate the bottle tip by touching their eye/eyelid when using the device than without the device (13% vs 37%, respectively, p = 0.02). Twenty-six subjects (86.7%) indicated they could see the drop using the device versus 12 (40%) who reported they saw the drop without the device (p = 0.0005). There were no statistically significant differences in any of the other outcomes. No predictive factors were associated with improved drop administration technique while using the device including uncorrected near-visual acuity, lens status, and glaucoma severity.
Conclusions:
Use of the mirror-hat aid is associated with significantly less bottle-tip contamination and better visualization of the drop than without the device; however, the device did not help to reduce time, number of drops, or accuracy when administering eye drops.
