Stahl,U., Keir,N. J., Landers,A., Jones,L. W. Effect of short recovery periods on ocular comfort during daily lens wear. Optometry and Vision Science 2016;93,8:861-871. [ Show Abstract ]
Purpose. To assess the impact of lens-free intervals of varying lengths on end-of-day comfort with soft contact lenses. Methods. Twenty-five symptomatic lens wearers participated in this randomized, cross-over study involving nine individual 12-hour days: one spectacle (no lens) and eight lens wear days. On each lens wear day, lenses were worn bilaterally in 2-hour intervals, separated by lens-free (recovery) periods of 0, 30, 60, or 80 minutes (repeated throughout the day). For each 2-hour lens wear interval, new lenses were worn. Ocular comfort was rated on a 0 to 100 visual analogue scale (0 = extremely uncomfortable); tear film and ocular parameters were assessed at the beginning and end of each study day. This study involved two different types of silicone hydrogel lenses, and the order of lens type and length of recovery period was randomized. Participants were unaware of the true study purpose and that a new lens pair was used for each lens wear interval. Results. End-of-day comfort on lens wear days was significantly worse than on the spectacle day (p 0.05). Although lens wear affected noninvasive tear film break-up time and conjunctival staining, there were no effects of recovery period length on noninvasive tear film break-up time (p > 0.05), tear meniscus height (p > 0.05), corneal staining (p > 0.05), conjunctival staining (p > 0.05), bulbar conjunctival redness (p > 0.05), or limbal redness (p > 0.05). There was no consistent effect of recovery period length on lid margin staining. Conclusions. Lens-free recovery periods during a 12-hour lens wear day did not positively impact end-of-day comfort in this study. Cumulative lens wear times ranged from 8 to 12 hours, and the results suggest that once the length of lens wear exceeds the usual comfortable wear time, there is no benefit of short recovery periods. Â© Copyright 2016 American Academy of Optometry.
Liu,S., Chang,C. N., Verma,M. S., Hileeto,D., Muntz,A., Stahl,U., Woods,J., Jones,L. W., Gu,F. X. Phenylboronic acid modified mucoadhesive nanoparticle drug carriers facilitate weekly treatment of experimentallyinduced dry eye syndrome. Nano Research 2015;8,2:621-635.
Craig,J. P., Willcox,M. D. P., Argüeso,P., Maissa,C., Stahl,U., Tomlinson,A., Wang,J., Yokoi,N., Stapleton,F. The TFOS International Workshop on Contact Lens Discomfort: Report of the contact lens interactions with the tear film subcommittee. Investigative Ophthalmology and Visual Science 2013;54,11:TFOS123-TFOS156.
Stahl U, Keir N, Guthrie S, Jones L. Effect of monocular lens wear on ocular comfort. TFOS conference, Montpelier, France, 2016.
Liu S, Chang C, Verma M, Hileeto D, Muntz A, Stahl U, Woods J, Jones L, Gu F. Phenylboronic acid modified mucoadhesive nanoparticles facilitate weekly treatment of dry eye syndrome. Invest Ophthalmol Vis Sci 2014;55: E-abstract 2160.
Subbaraman L, Stahl U, Heynen M, Babaei Omali N, Canavan K, Jones L. Is there a difference in tear film and meibum composition in asymptomatic adapted contact lens and spectacle wearers?. BCLA Clinical Conference and Exhibition, 2014. [ PDF ]
Schulze M, Subbaraman L, Babaei Omali N, Stahl U, Canavan K, Jones L. Is there a difference between clinical signs and symptoms in asymptomatic adapted contact lens and spectacle wearers?. BCLA Clinical Conference and Exhibition, 2014. [ PDF ]
Stahl U, Luensmann D, Lemp J, Moezzi A, Schulze M, Varikooty, Dumbleton K, Jones L. Determination of higher order aberrations with two silicone hydrogel toric lenses. Optom Vis Sci 2014;91: E-abstract 145188. [ PDF ]
Stahl U, Keir N, Varikooty J, Nandakumar K, Keech A, Landers A, Jones L. The effect of recovery periods on end of day comfort. Invest Ophthalmol Vis Sci 2013;54: E-Abstract 5462.
Stahl U, Jones L, Willcox M, Stapleton F. Tear osmolality measurements - effect of instrumentation and of freezing. Invest Ophthalmol Vis Sci 2009;50: E-abstract 2611.
Stahl U. Summary: Report of the Contact Lens Interactions with the Tear film Subcommittee. ContactLensUpdate.com 2014.
Varikooty J, Stahl U. Visualization of limbal/conjunctival folliculitis associated with soft contact lens wear. ContactLensUpdate.com 2012.
Jones L, Sorbara L, Stahl U, Thom M, Guthrie S. Contact Lens Compendium: Contact Lenses and Solutions Available in Canada. Vol 43. 2017.
Jones L, Sorbara L, Stahl U, Thom M, Guthrie S. Contact Lens Compendium: Contact Lenses and Solutions Available in Canada. Vol 42. 2016.
Jones L, Sorbara L, Stahl U, Thom M, Guthrie S. Contact Lens Compendium: Contact Lenses and Solutions Available in Canada. Vol 41. 2015.
Jones L, Sorbara L, Stahl U, Thom M, Guthrie S. Contact Lens Compendium: Contact Lenses and Solutions Available in Canada. Vol 40. 2014.
Jones L, Sorbara L, Stahl U, Guthrie S, Menzies K, Rossy J, Thom M. Contact Lens Compendium: Contact Lenses and Solutions Available in Canada. Vol 39. 2013.