Clinical Ophthalmology (Nov 2022)
Short-Term Fit Assessment of a Novel Daily Disposable, Toric, Silicone Hydrogel Contact Lens
Abstract
Britt Gustafson,1 Susan Whaley,2 Bradley Giedd,3 Stephen Montaquila,4 Brenda Edwards,5 Lakshman N Subbaraman6 1The Eye Doctors Inc, Eden Prairie, MN, USA; 2Tallahassee Eye Center, Tallahassee, FL, USA; 3Maitland Vision Center, Maitland, FL, USA; 4West Bay Eye Associates, Warwick, RI, USA; 5Heart of America Eye Care, Overland Park, KS, USA; 6Alcon Research, LLC, Johns Creek, GA, USACorrespondence: Lakshman N Subbaraman, Alcon Research, LLC, Clinical Development & Medical Affairs, Johns Creek, GA, 30097, USA, Tel +1 678 415 5316, Email [email protected]: The development of new contact lens materials and designs are necessary to minimise patient dropout. A lens material with water surface technology was recently developed to incorporate toric design. The on-eye stability of a toric contact lens is critical to a successful toric lens fitting. In an effort to establish if the new daily disposable verofilcon A toric silicone hydrogel lens provides fast stability for ease of fit, this study assessed the initial and short-term on-eye stability of this new lens.Patients and Methods: Habitual full-time wearers of soft contact lenses, aged 18 or over, were enrolled and fit with the verofilcon A toric lens. Study endpoints included lens settling time, axis orientation at specific time-points within 10 minutes after insertion, lens oscillation with blink, lens movement and centration, and scribe mark visibility.Results: Thirty-nine subjects completed the study; 67% were female and mean age was 34.1 ± 10.8 years (range 18 to 61). The majority of verofilcon A toric lenses (98.7%) settled on average within 60 seconds. Average lens orientation was 3° from six o’clock position within two minutes of insertion. The lenses showed minimal oscillation with blink; 98.7% of the eyes demonstrated ≤ 5° oscillation with blink. All lenses showed optimal/acceptable lens movement and centration and the scribe mark was reported as easily visible in 96% of eyes. Practitioners reported a 99% first lens fit success rate.Conclusion: The novel verofilcon A toric lens was highly successful with the first lens, had excellent on-eye stability and good fit characteristics. These qualities make this new lens a good option for lens wearers. Furthermore, it fulfills the needs of practitioners who want a toric lens that is easy and predictable to fit.Keywords: verofilcon A, easy to fit, settling time, orientation, surface technology
