This study will assess the optimal performance characteristics of optical defocus on transient changes in axial length with Kubota Glass, using a randomized, double-masked, 5-treatment, 5-period crossover design with contralateral eye control.
Be of legal age or, if under legal age have written consent of their parent or guardian to participate.
Sign written Informed Consent (and the California Bill of Rights, if applicable).
Be between age 8-24 (inclusive) and able to understand and assent to participation.
Have a spherical component of spectacle prescription between -1.00 and -5.00 diopters (D) (inclusive) in each eye.
Unable or unwilling to provide informed consent and assent.
Eye injury or surgery within twelve weeks immediately prior to enrollment.
Currently enrolled in an ophthalmic clinical trial.
Pregnant or lactating or expect to become pregnant during the trial (by self-report).
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Treatment groupsSee each treatment group below.