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P Situ, R du Toit, D Fonn, T Simpson; Refractive Error in Presbyopes After 6 months of Monovision Contact Lens Wear . Invest. Ophthalmol. Vis. Sci. 2002;43(13):3107.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To investigate whether there is a change of refractive error in presbyopic adults after wearing monovision contact lens. Methods: 57 presbyopes who had never worn monovision contact lens used ACUVUE lenses in a monovision modality (one eye for distance and the other for near) for 6 months. Ametropia was measured using a Nikon NRK-8000 before the lenses were worn and after 6 month of monovision (at least 8 hours/day, 5 days/week). Results: The mean changes over 6 month for distance and near eye were -0.03±0.39 D and 0.08±0.62D for spherical measure, 0.07 ± 0.27D and -0.04 ± 0.24D for cylindrical, respectively. No significant changes in spherocylindrical measurements were found for distance and near eye over 6 month (paired t-test all p≷0.05). The spherocylindrical measurements were also converted to a dioptric power matrix to represent vertical, torsional and horizontal components of the refraction measurement and analyzed using multivariate methods. MANOVA of these vector data showed no differences between distance and near eyes at baseline or after 6 months of lens wear (p=0.88). Conclusion: This study did not find significant changes of refractive error in presbyopic adults after 6 month of monovision contact lens wear.
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