Table 3.

Feature importance calculated by GBDT (top 10).

No.	Features	Feature importance
1	Horizontal disc angle	1.000
2	Spherical equivalent	0.723
3	Average cup depth	0.427
4	Nasal rim/disc area ratio	0.284
5	Age	0.145
6	cpRNFLT (superior sector in four sectors)	0.136
7	cpRNFLT (temporal superior sector in six sectors)	0.127
8	Cup area	0.040
9	Maximum cup depth	0.038
10	Superior nasal rim/disc area ratio	0.038