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Joseph Gray, Frank Spors, Jie Shen, Dorcas Tsang, Pinakin Gunvant Davey; Peripheral Ocular Refraction While Wearing Proclear Multifocal Center Distance Soft CL. Invest. Ophthalmol. Vis. Sci. 2020;61(7):1494.
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© ARVO (1962-2015); The Authors (2016-present)
To assess refractive profiles across the horizontal visual fields in the eyes of young adults using Proclear multifocal center distance soft contact lenses (PMCL) in all commercially available add powers.
The right eyes of 40 subjects free from any pathology, refractive error range sph -0.50 to -6.00, cyl -1.00 to 0.00 were fitted with spherical equivalent PMCL of add powers 1.00, 1.50, 2.00 and 2.50 D after determining baseline refractions with a Grand Seiko WAM-5500 Open Field autorefractor. Refractive data were measured across the horizontal visual field, from 30 degrees nasal to 30 degrees temporal, in 10-degree increments and converted into relative power vectors defocus M, astigmatism J0, and astigmatism J45.Statistical analysis using repeated-measures ANOVA and post-hoc Bonferroni correction was performed to evaluate statistically significant deviations of M, J0, and J45 from baseline across the horizontal visual field, differentiated by PMCL add power group.In addition, the performance of the different PMCL add power groups was evaluated and visualized individually for 10, 20, and 30 degrees retinal eccentricity.
Across the horizontal visual fieldM changed significantly with +2.50 D add power PMCL (p = 0.01). J0 changed significantly with +1.00 D add power PMCL (p = 0.007). The other PMCL add powers did not show any significant change for M, J0, and J45.At 10 degrees retinal eccentricityNone of the PMCL add powers did show any significant change for M, J0, and J45, compared to baseline data.At 20 degrees retinal eccentricityM changed significantly with +2.50 D add power PMCL (p < 0.001). J0 changed significantly with +1.00 D add power PMCL (p = 0.001).At 30 degrees retinal eccentricityM changed significantly with +2.50 D add power PMCL (p < 0.001). J0 changed significantly with +1.00 D add power PMCL (p = 0.001). J45 changed significantly with +1.50, +2.00, and +2.50 D add power PMCL (p < 0.001).
Along the horizontal visual field in the eyes of young adults, PMCL with the highest add power of +2.50 D should be used to establish the required defocus on a statistically significant level. In addition, PMCL of all add powers can influence astigmatisms J0 and J45 at 20- and 30-degrees retinal eccentricities.
This is a 2020 ARVO Annual Meeting abstract.
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