SS
Age-related dry eye
Systemic medications (eg, antihistamines, β-blockers, antispasmodics, diuretics)
Lacrimal gland duct obstruction (eg, cicatricial pemphigoid, mucous membrane pemphigoid, trachoma, erythema multiforme, burns)
Ocular sensory loss leading to reflex hyposecretion (eg, diabetes mellitus, corneal surgery, contact lens wear, trigeminal nerve injury)
Lacrimal gland infiltration (eg, sarcoid, lymphoma, graft vs host disease, AIDS, IgG4-related disease)
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Meibomian gland dysfunction (posterior blepharitis)
Exophthalmos, poor lid apposition, lid deformity
Low blink rate
Ocular surface disorders (eg, vitamin A deficiency, toxicity from topical drugs/preservatives, contact lens wear)
Ocular surface disease (eg, allergic conjunctivitis)
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