Other causes of keratoconjunctivitis
Viral conjunctivitis
Thygeson's Superficial Punctate<unk> 
Dry eyes
Acute mountain sickness
Chronic mountain sickness
High altitude cerebral edema
High altitude pulmonary edema
High altitude peripheral edema
High altitude retinopathy
High altitude pharyngitis and bronchitis<unk>
Ultraviolet keratitis
Other causes of keratoconjunctivitis
Bacterial keratitis
Viral conjunctivitis
Herpes simplex keratitis
Thygeson's Superficial Punctate Keratitis
Corneal ulcer
Dry eyes