Table 1 The graduation standard of MGD
Degree | Symptoms | Palpebral margin changes | Secretion character score | Secretion discharge capacity score | Meibomian gland deletion score | Corneal |
|---|---|---|---|---|---|---|
Mild | Slight, intermittent | Normal or mild hyperemia of palpebral margin and there may be fat cap formation | 1 | 1 | 1 | Normal, no epithelial damage |
Moderate | Mild or moderate, persistent | palpebral margin becomes blunt, round and thickened. Meibomian gland mouth was obstruction and protuberance | 2 | 2 | 2 | Mild or moderate epithelial damage, located at the periphery |
Severe | Moderate or severe, affecting life or work | The blepharon margin is thickened and the neovascularization is obvious. Fat thrombus formation in meibomian gland mouth | 3 | 3 | 3 | Damage to epithelium and superficial matrix |