Clinical Comparison of a Silicone Hydrogel and a Conventional Hydrogel Daily Disposable Contact Lens

Clin Ophthalmol. 2021 Oct 29;15:4339-4345. doi: 10.2147/OPTH.S332651. eCollection 2021.


Purpose: To compare the subjective performances of verofilcon A daily disposable silicone hydrogel contact lenses (CLs) and etafilcon A hydrogel CLs.

Methods: Successful wearers of spherical soft CLs for distance correction were prospectively randomized to wear verofilcon A or etafilcon A lenses for 1 week and crossed over to the alternative lenses. The primary study objective was a comparison of distance visual acuity (VA). Exploratory endpoints included subjective overall lens preference (5-point scale) and subjective ratings (10-point scales) of end-of-day (EOD) vision, overall handling, insertion comfort, EOD comfort, overall quality of vision, overall comfort, vision throughout the day, lens handling at insertion, and lens handling at removal.

Results: Of 92 subjects (184 eyes), 46 each were randomized to verofilcon A or etafilcon A lenses and subsequently crossed over to the other lenses. Evaluation of distance VA showed that verofilcon A lenses were noninferior to etafilcon A lenses. Comparison of lens preference showed that 68 (73.9%) subjects somewhat or strongly preferred verofilcon A lenses, whereas 21 (22.9%) somewhat or strongly preferred etafilcon A lenses (p<0.0001). Mean ± SD ratings of EOD vision (8.6±1.5 vs 7.7±1.9), overall handling (8.7±1.5 vs 6.9±2.3), insertion comfort (9.2±1.0 vs 7.7±1.9), and EOD comfort (8.0±1.9 vs 7.0±2.2) were all significantly (p≤0.0001 each) higher for verofilcon A than for etafilcon A lenses. Mean ± SD ratings of overall quality of vision (8.9±1.2 vs 8.2±1.8), overall comfort (8.6±1.5 vs 7.4±1.8), vision throughout the day (8.9±1.3 vs 8.1±1.8), lens handling at insertion (9.0±1.4 vs 6.9±2.5), and lens handling at removal (8.3±2.1 vs 7.7±2.2) were also significantly higher for verofilcon A lenses. No subject experienced any ocular adverse events.

Conclusion: After 1 week of wear, the study population reported that ratings for subjective endpoints were significantly higher for verofilcon A lenses than for etafilcon A lenses.

Keywords: etafilcon A; subjective; verofilcon A; visual acuity.

Grants and funding

Dr Lakshman N. Subbaraman is an employee of Alcon Research, LLC. Editorial support was provided by BelMed, Inc. with funding by Alcon Research, LLC.