Clinical Research Directory

Inclusion Criteria: * Inclusion Criteria: * Subjects must be 18 years or older * Ability to comprehend written consent and provide informed consent * Ability to commit to and complete study related paperwork and activities (i.e. subject forms, have de-identified pictures taken, comply with periods of no movement, etc.) Exclusion Criteria: * Pregnant women * Diagnosis of essential tremor or any medical condition causing tremors of the head or hands * Facial tattoos, scars, large moles, beards/hair growth, birthmarks, vitiligo, skin conditions, facial discoloration, or heavy makeup within the areas of interest * Inability for subject to avoid extreme movement during measurement reading windows * Inability for subject to raise their hand during measurement reading windows * No heart arrythmias * Discretion of the Principal investigator or clinical study staff