Causes

Evaporative or aqueous-deficient dry eye? The two types need different treatment. Learn how to tell them apart and why it decides your therapy.

Blepharitis and dry eye look alike and often occur together. Learn the difference, why it matters for treatment, and how each is diagnosed.

Your tear film has three layers – oil, water and mucin. Learn why a single missing layer dries your eyes and how each one is assessed.

Meibomian gland dysfunction is the leading cause of dry eye. Learn what the glands do, what goes wrong, and why artificial tears aren’t enough.