Study in Pediatric Volunteers of a Handheld Device Versus a Standard Diagnostic Device in Ophthalmic Refraction

Inclusion Criteria: * Male or Female * Ages ≥6 y.o. and \<18 y.o. * Binocular vision * Parent(s) or Guardian(s) willing and able to give informed consent on behalf of the subject. * Subject able to follow all study procedures and requirements Exclusion Criteria: * Spherical correction \> +8 or \< -10 * Using anticholinergic medications (including first-generation antihistamines) or other medications known to affect visual acuity within the greater of 3 days or 5 half-lives prior to enrolling in this study. * Using an investigational drug or approved therapy for investigational use within the greater of 3 days or 5 half-lives prior to enrolling in this study. * Has initiated any new medication in the past 2 weeks that, in the best medical judgment of the investigator, would impact their participation in the study or ability to use the EyeQue EQ103 device, * Any self/caregiver-reported mental illness or condition of the subject, including but not limited to claustrophobia, fear of simulators, nyctophobia. * Any self/caregiver-reported neurological diseases of the subject, including but not limited to: epilepsy, nystagmus. * Any self/caregiver-reported glaucoma diagnosis of the subject. * Eye disease, including but not limited to: * Cataracts * Macular degeneration * Eye infection (by self-report or observation) * Keratoconus * Diabetic neuropathy/retinopathy * Cytomegalovirus retinitis * Color blindness (any color deficiency) * Diabetic macular edema * Amblyopia * Chronic or acute uveitis * Strabismus * Astigmatism \> 3 diopters * Macular hole * Lack physical dexterity to properly operate the EyeQue device. * Lack the ability to follow instruction. * Lack binocular vision. * Are colorblind. * Had eye surgery within the last 12 months.