This article is part of Optometry Advisor’s conference coverage from the 2021 meeting of the American Academy of Optometry, held in Boston from November 3 to 6, 2021. The team at Optometry Advisor will be reporting on a variety of the research presented by the primary eye care experts at the AAO. Check back for more from the AAO Optometry 2021 Meeting..
Intermediate vision clarity varies between multifocal contact lenses (MFCL), according to study results presented at the American Academy of Optometry 2021 meeting in Boston. More specifically, the analysis shows that stenfilcon A MFCL (stenA-MFCL) provides better vision clarity at intermediate distance than delefilcon A MFCL (delA-MFCL).
Researchers conducted a study to evaluate the performance of habitual MFCL (hab-MFCL), stenA-MFCL, and delA-MFCL for intermediate distance vision in existing MFCL wearers. The study recruited 58 patients (mean age 54.4±7.3 years, 50 women) with less than 1.00 DC of astigmatism. The investigators determined intermediate visual acuity (VA) at 0.75m and they collected subjective responses along with preference ratings.
After 2 weeks of being worn, intermediate logMAR VA with stenA-MFCL (0.08±0.10 logMAR) was notably better compared with hab-MFCL (0.12±0.11 logMAR, P =.002) and compared with delA-MFCL (0.12±0.12 logMAR, P <.001). Ratings for intermediate vision clarity were similar between hab-MFCL and stenA-MFCL (P =1.00), while both were rated better than delA-MFCL (P =.01 for both), according to the report.
Preference ratings for intermediate vision clarity revealed no significant preferences towards stenA-MFCL over hab-MFCL (P =.36); however, both were preferred over delA-MFCL (P =.03 for both). Vision clarity with digital device use and overall vision clarity were preferred with stenA-MFCL vs delA-MFCL (P ≤.03 for both), while no preference was found between stenA-MFCL and hab-MFCL regarding those questions (P >.05 for both). All MFCLs were successfully worn for 2 weeks.
“Digital devices are frequently used at work and during leisure time today and form part of the need for optimal intermediate vision,” the study explained. “While it may often be overshadowed by distance and near vision assessments, good performance at the intermediate distance can be just as critical to ensure success in MFCL wearers.”
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Luensmann D, Schulze MM, Woods J, Vega J, Orsborn G. Intermediate Vision with Multifocal Contact Lenses. Poster Presented at: American Academy of Optometry 2021 Annual Meeting: November 4, 2021; Boston. Board #47.