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Downloadable software for measuring and assessing visual acuity; downloadable software for measuring and assessing vision abnormalities; downloadable software for measuring and assessing refractive error of the eye

Providing temporary use of online non-downloadable software for measuring and assessing visual acuity; providing temporary use of online non-downloadable software for measuring and assessing vision abnormalities; providing temporary use of online non-downloadable software for measuring and assessing refractive error of the eye