Figure 2

Anterior lamina cribrosa (LC) depth along the superior-inferior (S-I) and nasal-temporal (N-T) axes across the three groups: healthy controls, mild-moderate primary open angle glaucoma (POAG) and advanced POAG. (A) Along the S-I direction, the LC is more posterior (deeper) with increasing severity of glaucoma; the central ridge also becomes less prominent, with the general shape changing from a “W” to a flatter “U”. (B) Along the N-T direction, the LC is overall “U”-shaped; the LC is also more posterior with increasing severity of glaucoma.