DRy Eye Outcome and Prescription Study

Inclusion Criteria: * adult patients (18 years and over) with symptoms\* of dry eye disease (with or without signs, with or without blepharitis) who start one or more artificial tears. \*Symptoms of dry eye disease include: foreign body sensation, dryness, irritation, itching, burning, stinging or grittiness. When signs are present, symptoms of visual disturbance such as poor vision and blurred vision are sufficient as a symptom of dry eye disease too * must have best corrected visual acuity in at least one eye of at least 6/12. Exclusion Criteria: * lacks capacity (e.g. dementia) * poor understanding of English * active other apparent ocular surface disease (including conjunctivitis, abrasion, recurrent erosion syndrome, episcleritis, inflamed pingueculum or pterygium, tumour, infectious keratitis). * immune ocular pathology (including scleritis and uveitis). * recent (within the last 3 months) or planned ocular surgery or intravitreal injections. * current use of other ocular medication, e.g. antiglaucoma drops, g ciclosporine. * use of artificial tears or ointment in the last 1 month. * gross lid abnormalities, including significant ectropion or entropion; facial nerve palsy; thyroid eye disease; trichiasis. For the qualitative interview study: Subject inclusion criteria \- London NHS Consultant with at least 6 months experience as a Consultant, with a special interest in Cornea and External Diseases, Accident and Emergency and Primary Care, or General Ophthalmology