Clinical diagnosis
Generally clear discharge without underlying conjunctivitis and lacrimal flow<unk> 
Generally clear discharge without underlying conjunctivitis and lacrimal flow<unk> 
Not always necessary, but used to test if tears are draining at proper rate (particularly for intermittent symptoms)
Normal (no<unk> : all fluorescein drained into the nose
Abnormal (obstructed): dye remains in eye (visible as a bright green tear meniscus) or escapes over eyelid to drain down cheek
Nasolacrimal duct obstruction
Ocular foreign body
Dacrocystitis
Vitreous hemorrhage
Conjunctivitis
Orbital cellulitis
Chemical
Conjunctival abrasion