Intraocular Straylight and Multifocal Soft Contact Lens Fit With a Myopia Control Approach.

OBJECTIVES: Center-distance multifocal contact lenses (MFCLs) are used to slow myopia progression. We examined the effect of two MFCLs on intraocular straylight values in myopic individuals.

METHODS: Twenty-five young myopic adults were enrolled and were fit with three contact lenses (Biofinity sphere, Biofinity Multifocal, and NaturalVue Multifocal) in a random order over two study visits. Pupil size (NeurOptics VIP-300, Laguna Hills, CA) and contact lens centration were measured. Right eye intraocular straylight measurements were collected (OCULUS C-Quant; Wetzlar, Germany) and compared with a spectacle trial lens. Log straylight (LogSL) values and straylight residuals were analyzed using repeated-measures analyses of variance with Tukey-corrected post hoc t-tests.

RESULTS: The mean participant age (±SD) was 24.1±1.5 years, and right eye spherical equivalent refractive error was -3.38±1.53 DS. There was no difference in mesopic pupil size between visits (P=0.68) and no difference in contact lens centration between lenses (P=0.99). LogSL values differed by lens type (P=0.004). LogSL with the spectacle trial lens was significantly greater than with each contact lens type (all P<0.05), but there were no significant differences in LogSL between the three contact lenses (all P>0.05). There was no difference between the three contact lens designs for straylight residuals (P=0.33).

CONCLUSIONS: Measured intraocular straylight for both MFCLs was not different than with a spherical soft contact lens. A significant increase in intraocular straylight with spectacle trial lens correction was observed compared with all contact lenses.