Sjögren's syndrome
Blepharitis
Parkinson's disease
Vitamin A deficiency
Neurotrophic keratitis
VII nerve palsy
Systemic medication
Certain ophthalmic products
Fluctuations in hormone levels
Age
|
Environmental factors
(e.g. wind, air conditioning, cigarette smoke,
excess use of computer screen)
Long-term contact lens wear
Refractive surgery (e.g. LASIK, PRK) |