Clinical Trial to Improve the Magnetic Levator Prosthesis

Inclusion Criteria: * Experimental: * Presence of ptosis for at least one eye which obscures the visual axis in the resting position (without frontalis drive, lifting with forehead muscles) * Moderate cognitive function or better defined as greater than or equal to 18 out of 30 on a pre-screening of the Mini-Mental State Exam * Age 5 or older Exclusion Criteria: * Experimental: * Absence of blepharoptosis or presence of a corneal ulcer. * Those with a corneal ulcer are at risk for permanent loss of vision and should be managed with proven methods. * Age less than 5, * Severe Cognitive impairment defined as MMSE score \<18, behaviors consistent with delirium (combinations of disorientation, hallucinations, delusions, and incoherent speech), or lethargy. These individuals must be excluded since participation requires competent self-care, reliable responses and cooperation during fitting of the devices.