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Daily disposed hydrogel lenses--a comparison with biweekly replacement
1Department of Optometry, School of Optometry, University of Alabama at Birmingham 35294-0010.
Journal of the American Optometric Association
|March 1, 1994
Summary
Daily replacement of hydrogel lenses showed no significant difference in comfort, vision, or eye health compared to biweekly replacement. This study suggests daily disposal may not offer advantages over biweekly schedules for these contact lenses.
Area of Science:
- Ophthalmology
- Corneal Physiology
- Contact Lens Technology
Background:
- Daily disposable hydrogel lenses represent an under-investigated prescribing extreme.
- Previous research has not extensively compared daily versus biweekly replacement schedules for hydrogel lenses.
Purpose of the Study:
- To investigate differences in patient comfort, visual acuity, and ocular physiological response between daily and biweekly hydrogel lens replacement.
- To compare the performance of hydrogel lenses based on their replacement frequency.
Main Methods:
- A masked, direct comparison study design was employed.
- Eighteen subjects wore Bausch & Lomb Seequence 2 hydrogel lenses.
- Subjects compared 1-day-old lenses directly against 2-week-old lenses.
Main Results:
- No significant differences were observed in visual acuity between the two replacement schedules.
- Lens condition and corneal/conjunctival staining showed no significant variations.
- Subjective ratings for wearing comfort and visual clarity were comparable for both daily and biweekly lenses.
Conclusions:
- Replacing hydrogel lenses on a daily schedule offers no apparent advantage over a biweekly schedule.
- Vision, comfort, and physiological responses were similar regardless of replacement frequency.
- The study found no clinical benefit to daily replacement of the evaluated hydrogel lenses.