Anterior Chamber Angle Evaluation following Phakic Posterior Chamber Collamer Lens with CentraFLOW and Its Correlation with ICL Vault and Intraocular Pressure

Table 1

Limbal anterior chamber depth grading system.

Van Herick grade	Limbal anterior chamber depth: corneal section thickness (fraction)	Limbal anterior chamber depth (percentage of corneal section thickness)
0	0 (closed)	0%
1	<1/4	5%; 15%
2	1/4	25%
3	1/4 to 1/2	40%; 75%
4	1 or >1	≥100%