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A clinical evaluation of extended wear (overnight) use of the Boston Equalens

1 May 1988


The development of a new rigid gas permeable contact lens material with increased oxygen permeability that incorporates the benefits of silicone/acrylate materials, has attracted considerable attention in the contact lens field. The addition of fluorine combined with silicone/acrylate results is a contact lens material that has the ability to resist mucous adhesion and deposit formation, while at the same time promote an affinity for tear mucin and soluble proteins. This increases the wettability of the contact lens, resulting in improved comfort and increased wearing time. In this study eighteen subjects were fit with this new rigid gas permeable contact lens, the Boston Equalens. The subjects wore two contact lenses, one on each eye, on an extended wear basis for a period of 120 days. Thirty-nine percent of the subjects successfully wore the contact lenses on c:in extended wear basis for a period of 63 to 120 days. Another forty-four percent of the subjects completed between 14 to 56 days of extended wear. There did not appear to be significant changes in the refractive error, corneal curvature, nor an increase in subjective complaints during extended wear.


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