Both CIBA Vision and Bausch & Lomb responded independently to questions posed by the ICLC Editors. While some areas for corporate response were “off-limits” because of current litigation between the two corporations regarding patent issues, the interview offers a corporate perspective on development, characteristics, and future possibilities of silicone hydrogels. Consistently listing one company’s answers first was done to make reading easier and has no other significance.—Ed.
This open-label study compares three daily disposable hydrogel contact lenses, Focus® Dailies® (Ciba Vision), 1-Day Acuvue® (Vistakon, a division of Johnson & Johnson), and SofLens® one day disposable (Bausch & Lomb). Comparisons were made by soliciting participant preference among factors such as overall satisfaction, comfort, satisfaction with vision, dryness, eye strain, ease of handling, irritation upon insertion, frequency of solution use, and rate of damage of contact lenses. Subjects were randomly given appropriate Focus® Dailies®, 1-Day Acuvue®, and SofLens® one day disposable to use on both eyes for 2-week periods. After use of each of the three lens designs, the participants filled out a questionnaire about their wearing experience and their eyes were evaluated for contact lens complications. They also filled out a final questionnaire. Fifty percent of the participants favored Focus® Dailies® in a forced-choice comparison although 1-Day Acuvue® and SofLens® one day disposable scored higher in overall satisfaction. We find that participant preference appears to be influenced by factors other than performance on the eye. Factors such as packaging (easy to open) and lens designs that enhance handling strongly influence patient lens preference.
Background. We sought to consider the low success rate of bifocal soft contact lenses through low-contrast visual acuity measurements using one popular design.
Methods. Visual performance was measured in 23 nonpresbyopic patients with a single-vision and a concentric bifocal soft contact lens.
Results. There was a statistically significant difference (p = 0.01) between the performances of the two soft lenses when measuring low-contrast visual acuity using a Bailey-Lovie chart. However, no significant difference was found when measuring high-contrast Snellen visual acuity.
Conclusion. While Snellen acuity is the most widely accepted form of acuity measurement, low-contrast visual acuity may be a sensitive measure of visual function when evaluating bifocal soft contact lenses.
A patient was fitted with rigid gas permeable contact lenses following systemic varicella. Scarring of the inferior limbus was noted in both eyes and was historically associated with this systemic disease episode.
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