<unk>  film<unk> -up<unk>  is abnormal in several conditions like aqueous<unk>  deficiency, keratoconjunctivitis sicca, mucin deficiency, and meibomian gland disorders. Evaporative dryness can also be seen in conditions like lagophthalmos, proptosis, Parkinson's disease, computer vision syndrome, contact lens use, drugs (antihistamines, beta blockers, antispasmodics, diuretics) and vitamin A deficiency, amongst others.
Tear break-up time
Tidal volume
Cup-to-disc ratio
Ultraviolet index
Neurological pupil index
FEV1/FVC ratio
Electrochemical skin conductance
NC ratio