Study to Compare the Diopsys NOVA and LKC RETeval Devices

Inclusion Criteria: * Male or female at least 22 years of age on day of enrollment * BCVA letter score of 75 or better (Snellen equivalent of 20/32 or better) on day of enrollment * Eyes are healthy/normal based on prior examinations, record review, and/or patient intake questions. Subject has not been diagnosed with any ocular pathology that could affect ERG results. * Able to communicate well with the Investigator and able to understand and comply with the requirements of the study * Informed of the nature of this study and has provided written, informed consent in accordance with institutional, local and national regulatory guidelines Exclusion Criteria: * A spherical refraction outside + 5.0 D and cylinder correction outside + 3.0 D on day of enrollment * Intraocular surgery (except non-complicated cataract or refractive surgery performed more than 1 year before enrollment) * Any prior macular or panretinal photocoagulation laser treatment * History of ophthalmic or neurologic condition known to affect visual function * Inability to obtain a reliable ERG test * History of Diabetic retinopathy * History of Glaucoma * History of ARMD * History of seizure disorder * Has an open sore(s) or dermatological condition that may come in contact with the electrodes/electrode arrays * In the opinion of the Investigator, is unlikely to comply with the study protocol