Investigational Study of Accommodation Triggering and Control to Allow for the Performance of Refraction Measurements

• Male or Female
• Age 18 through 30 years at the time of consent
• Binocular vision
• Willing and able to give informed consent and follow all study procedures and requirements
• Fluent in English

Exclusion Criteria:

• Spherical correction > +4D or \< -5D, astigmatism \< -2.5D.
• 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 EyeQue devices

• Reported or observed eye disease or pathology, including but not limited to:

  • Glaucoma
  • Cataracts
  • Macular degeneration
  • Eye infection
  • Keratoconus
  • Diabetic neuropathy/retinopathy
  • Cytomegalovirus retinitis
  • Color blindness (any color deficiency)
  • Diabetic macular edema
  • Amblyopia
  • Chronic or acute uveitis (cells and/or flare in anterior chamber)
  • Strabismus (exotropia, esotropia, and hypertropia)
  • Macular hole
• Eye surgery within the last 12 months (including Lasik or lens replacement)
• Subject does not have the physical dexterity to properly operate the EyeQue VisionCheck device or the EyeQue app on the smartphone in the investigator's opinion
• PD smaller than 50mm or larger than 75mm.
• Any self-reported mental illness or condition, including but not limited to: claustrophobia, fear of simulators, nyctophobia.
• Any self-reported neurological diseases, including but not limited to: epilepsy, Alzheimer's, nystagmus.