Drop Discomfort was assessed using the Individual Symptom Severity Assessment Visual Analog Scale (VAS) where the subject will complete the assessment 1 minute post-instillation on Day 1. The VAS scale is 0 - 100, where 0 corresponds to "no discomfort" and 100 corresponds to "maximal discomfort".

Intent to Treat

Drop Discomfort was assessed using the Individual Symptom Severity Assessment Visual Analog Scale (VAS) where the subject will complete the assessment 1 minute post-instillation on Day 28. The VAS scale is 0 - 100, where 0 corresponds to "no discomfort" and 100 corresponds to "maximal discomfort".

Burning/Stinging was assessed using the Individual Symptom Severity Assessment Visual Analog Scale (VAS) where the subject will complete the assessment post-instillation on Day 28. The VAS scale is 0 - 100, where 0 corresponds to "no burning/stinging" and 100 corresponds to "worst burning/stinging".

Intent to Treat

Foreign Body Sensation was assessed using the Individual Symptom Severity Assessment Visual Analog Scale (VAS) where the subject will complete the assessment post-instillation on Day 28. The VAS scale is 0 - 100, where 0 corresponds to "no foreign body sensation" and 100 corresponds to "worst foreign body sensation".

Intent to Treat

Photophobia was assessed using the Individual Symptom Severity Assessment Visual Analog Scale (VAS) where the subject will complete the assessment post-instillation on Day 28. The VAS scale is 0 - 100, where 0 corresponds to "no photophobia" and 100 corresponds to "worst photophobia".

Intent to Treat

Eye pain was assessed using the Individual Symptom Severity Assessment Visual Analog Scale (VAS) where the subject will complete the assessment post-instillation on Day 28. The VAS scale is 0 - 100, where 0 corresponds to "no eye pain" and 100 corresponds to "worst eye pain".

Intent to Treat

Eye dryness was assessed using the Individual Symptom Severity Assessment Visual Analog Scale (VAS) where the subject will complete the assessment post-instillation on Day 28. The VAS scale is 0 - 100, where 0 corresponds to "no eye dryness" and 100 corresponds to "worst eye dryness".

Intent to Treat

Itching was assessed using the Individual Symptom Severity Assessment Visual Analog Scale (VAS) where the subject will complete the assessment post-instillation on Day 28. The VAS scale is 0 - 100, where 0 corresponds to "no itching" and 100 corresponds to "worst itching".

Intent to Treat

The Individual Symptom Severity Assessment Visual Analog Scale (VAS) includes Burning/Stinging (scale 0 - 100; 0 = no Burning/Stinging, 100 = worst Burning/Stinging), Foreign Body Sensation (scale 0 - 100; 0 = no Foreign Body Sensation, 100 = worst Foreign Body Sensation), Photophobia (scale 0 - 100; 0 = no Photophobia, 100 = worst Photophobia), Eye Pain (scale 0 - 100; 0 = no Eye Pain, 100 = worst Eye Pain), Eye Dryness (scale 0 - 100; 0 = no Eye Dryness, 100 = worst Eye Dryness), and Itching (scale 0 - 100; 0 = no Itching, 100 = worst Itching). The total sum of all 6 symptoms (Burning/Stinging, Foreign Body Sensation, Photophobia, Eye Pain, Eye Dryness, Itching) were evaluated (scale 0 - 600; 0 = no visual symptoms, 600 = worst visual symptoms).

Intent to Treat

The Symptom Assessment in Dry Eye (SANDE) is a subjective rating performed by the subjects for the frequency and severity of their dry eye symptoms. The total length of the line is 100mm. For Frequency of Symptoms 0mm = "rarely" and 100mm = "all the time". For Severity of Symptoms 0mm = "very mild" and 100mm = "very severe". Subjects were asked to subjectively rate the frequency and severity of their symptoms by placing an "X" on the relevant horizontal line. The length of the line between the "rarely" or "very mild" starting point and the first point where the subject's mark crosses each line was measured and recorded in millimeters.

Intent to Treat

The Schirmer Test Score recorded tear production on test strips. The Schirmer tear test was conducted 1 hour following administration of VOS/Comparator and 20 minutes following fluorescein corneal staining. Using a ruler and/or the millimeters recorded on the strips, a point halfway between the two lines was measured and this was recorded as the amount of wetting. Lower scores indicate less tear production and therefore a worse outcome. Normal tear production is ≥10mm of wetting on the test strip, and severe dry eye is <5mm of wetting on the test strip.

Intent to Treat

The FCS score was summarized for each eye separately. Each of the 5 sections of cornea (superior, inferior, nasal, temporal, central) were graded using the National Eye Institute (NEI) scale; 0, 1 (mild), 2 (moderate), or 3 (severe). The total score was obtained by summing each of the 5 sections of the cornea from 0 - 15. Lower scores indicate less staining and therefore a better outcome.

Intent to Treat