Abstract
PurposeTo investigate light transmission and preference for six eye patches for occlusion therapy.MethodsSix patches were examined, including; Ortopad Fun Pack, Ortopad Flesh, Kawamoto A-1, Kawamoto A-2, 3M Opticlude, and Everade Eye Guard. The size and the presence of a light blocking pad of patches were investigated. The amount of light transmitted through the patches was evaluated, using a digital light meter and a model eye, in three different environments; indoors with fluorescent light, outdoors on a sunny day, and strong light from illuminator. After patching the normal eye, the flash visual evoked potential (VEP) was measured. Thirty patients with amblyopia or horizontal strabismus, who received occlusion therapy as initial treatment, were included. After using all six patches, patients completed a 7-item questionnaire regarding the patch preference for size, color and shape, adhesive power, pain with removal, skin irritation after removing patch, parent’s preference and overall opinion.ResultsAll patches had a light-blocking pad, except the 3M Nexcare. Ortopad had the strongest light blocking power in the three environments, and the 3M Nexcare had the weakest power. In flash VEP, Ortopad and Kawamoto patches showed flat, but 3M Nexcare and Everade Eye Guard showed normal response. There were significant preferential differences among the patches in all the items of the questionnaire (P<0.05). In comparison between the patches respectively, 3M Nexcare received the lowest satisfaction in pain when removing a patch and skin irritation after removing a patch. Kawamoto A-2 received the lowest score in the overall satisfaction.ConclusionsWe found differences in the light-blocking power and in the preference of the various patches for the occlusion treatment. This is a pilot study regarding only characteristics and preferences of patches. Further clinical studies regarding the relationship between characteristics or preferences of patches and outcomes of occlusion treatment are needed.
Highlights
Further clinical studies regarding the relationship between characteristics or preferences of patches and outcomes of occlusion treatment are needed
There have been few investigations concerning the patch as a tool for occlusion therapy
The purpose of this pilot study is to investigate the amount of light transmission and the preference of various eye patches for the occlusion treatment
Summary
Amblyopia is the most frequent cause of visual impairment in children, with a reported prevalence of 1% to 5%. [1] Patching of the non-amblyopic eye has been the mainstay of amblyopia treatment.[2,3,4] patching is used in intermittent exotropia and esotropia as an antisuppression exercise to improve the fusion and reduce the angle of deviation. [5,6] Compliance is the most important factor for effective patching treatment.[7,8,9] Many factors, such as patient’s age, initial visual acuity, refractive error and parental understanding, contribute to the compliance of eye patching. [10,11] Nowadays, many brands of patches are available. There have been few investigations concerning the patch as a tool for occlusion therapy. We thought that the light transmission of the patches is variable, and cosmetic problem as well as comfort of use of the patches will affect the preference of the patches and the compliance of the patching treatment. The purpose of this pilot study is to investigate the amount of light transmission and the preference of various eye patches for the occlusion treatment
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