Figure 2. Representative images of lid margin, meiboghraphy of eye lids and fluorescein staining (Fluorescein) in patients from resting or progressive pterygium groups and normal controls.

For lid margin and meibography of the eye lids, the score of each image is noted at bottom left. The left column shows normal eyes: the right eye from a 55-year-old female, OSDI: 13; NIBUT: 10.36 s; Schirmer test: 14 mm; the expressibility score was 2, and the meibum score was 1. The middle column shows eyes from resting pterygium group: the right eye from a 54-year-old female, OSDI: 19; NIBUT: 6.48 s; Schirmer test: 13 mm; the expressibility score was 2, and the meibum score was 2. The right column shows eyes from progressive pterygium group: the right eye from a 56-year-old female, OSDI: 26; NIBUT: 4.12 s; Schirmer test: 11 mm; the expressibility score was 3, and the meibum score was 3. The vascular engorgement is outlined by red arrow and plugged meibomian gland orifice is outlined by white arrow. The area of meibomian gland dropout was encircled with dotted white lines. Very few punctate corneal fluorescein staining in noted in pterygium eyes.