The CLASS Surgical Site Characteristics in a Clinical Grading Scale and Anterior Segment Optical Coherence Tomography: A One-Year Follow-Up

Purpose. We combined a clinical grading scale and swept source anterior segment OCT to describe the successful and failed CLASS. Material and Methods. 23 patients in the successful group and 17 patients in the failed group were compared in terms of the IBAGS grades and AS-OCT findings at one, three, and twelve months postoperatively. Results. The majority in the successful group presented shallow blebs (91%, 57%, and 52% at 1M, 3M, and 12M, resp.). 59% of the failed group presented no bleb (H0 E0) from the early postoperative period with the rate increasing to 88% at 3M and 100% at 12M. The scleral lake was detected in all the successful patients. The successful group showed significantly higher rates of TDM integrity (P<0.001), IF (P<0.001), and SCF (P<0.05), but there were no significant differences in the rates of microcysts between the groups (P>0.05). We found a significant decrease in the SL anteroposterior extent (P=0.003) and SL height (P