Low Level Light Therapy & Skin Pigmentation

Inclusion Criteria: * Ability to read and understand the study informed consent in English * Age 18 years or older at enrollment * Individuals with MGD based on one or more of the following clinical signs/symptoms, e.g., meibum quality score of 1-3 (Bron et al.), meibography score of 1, 2, or 3 on the Pult Meiboscale, non-invasive 1st tear break up time of 10 seconds or less, or an Ocular Surface Disease Index (OSDI) score greater than 12 points. Exclusion Criteria: * Active anterior segment pathology (e.g., bacterial conjunctivitis, microbial keratitis) * History of systemic disease associated with aqueous-deficient dry eye disease (e.g., Sjogren's syndrome) * History of corneal surgery, refractive surgery, or eyelid surgery within 6 months * History of corneal ectasia (e.g. keratoconus, Pellucid marginal degeneration) * History of ocular trauma within 6 months * History of LipiFlow, iLux, Meiboflow, IPL or LLLT within the last 12 months * Habitual use of photosensitizing medications within the last 30 days * Pregnant and/or lactating females, by self-report * Pigmented lesions, tattoos, or skin cancer in the periocular region * Unwilling to have eyes photographed or video recorded