**2.2 Dry Eye Questionnaire (DEQ-5)**

It is a questionnaire in which 4 dimensions are used to measure a series of symptoms. The 4 dimensions are -.

a.Frequency of watery eyes.

b.Degree of bother.

c.Late day intensity of discomfort and dryness (PM intensity).

d.Morning intensity of discomfort and dryness (AM intensity).

DEQ-5 scores of ≥ 6 establish suspicion of DED and indicates further clinical testing and of ≥ 12 establishes a suspicion of Sjogren syndrome (SS) [4].

A study reported that 10% of patients with non-Sjogren syndrome DED and 30% of patients with Sjogren syndrome complained of impaired vision while few of the other studies reported that 42% and 80% of patients with Sjogren syndrome experienced impaired vision [5–7].

It is believed that open-eye conditions might affect symptom progression as visual problems generally increase in intensity over the day [8].
