Neurosensory Abnormalities in SymptomAtic Ocular Surface Patients (NASA)

Neurosensory Abnormalities in SymptomAtic Ocular Surface Patients (NASA)

This study is designed to measure how common nerve abnormalities are within a group of patients who feel discomfort within their eyes.

Inclusion Criteria:

• Presents with ocular surface discomfort or for dry eye care
• Best corrected visual acuity of 20/40 or better in each eye
• Subject reported duration of symptoms of at least 3 months
• 100 subjects will be required to be habitual contact lens wearers as defined by use of contact lenses at least 5 hours per day at least 5 days per week for the last year.

Exclusion Criteria:

• Use of contact lenses on the day of the visit
• Pregnant or nursing
• Irregular corneas (e.g., ectatic disease, transplantation, or corneal dystrophies)
• Ocular surgery in the past 3 months
• Ocular infection in the past 3 months
• Active ocular allergies