This study is designed to test a potential biomarker to identify NCP patients. A biomarker is a characteristic that is unique to NCP patients and will help to identify them from DED patients so that correct treatment can be provided to them.
Inclusion Criteria
- Dry Eye Disease (DED) Group: complaint of ocular surface discomfort or dry eye disease; symptoms lasting at least 3 months; presence of 2 markers (Anesthetized Schirmer's score <10mm; corneal staining of >3/15; or Tear breakup time <10 seconds)
- Neuropathic Corneal Pain (NCP) Group: complaint of ocular surface discomfort or dry eye disease; symptoms lasting at least 3 months; presence of 2 markers (Anesthetized Schirmer's score >10mm; corneal staining of 10 seconds)
- Control Group: No symptoms of ocular surface discomfort or dry eye disease; All in the following of both eyes:Anesthetized Schirmer's score >10mm; corneal staining of 10 seconds); the same sex and within 5 years of age of a patient in the NCP group
Exclusion Criteria
- Pregnant or nursing
- Irregular corneal disease
- Ocular surgery or infection in the past 3 months
Study Requirements
DED, NCP, and control group participants will have a standard of care visit and the In-vivo confocal microscopy (IVCM). A set number of participants will also be asked to complete a follow-up IVCM at a separate, research-only, visit.