Table 7. Main causes of fitting failure.

Groups	Dimension 1, visual acuity	Dimension 2, lens fitting	Dimension 3, visual quality	Dimension 4, comfort
Group A	0	4 (25.00%)	7 (43.75%)	5 (31.25%)
Group B	2 (13.33%)	2 (13.33%)	7 (46.67%)	4 (26.67%)
Group C	1 (16.67%)	1 (16.67%)	4 (66.67%)	0

Group A: Cylinder degree range of -0.75 to -0.50 D; Group B: Cylinder degree range of -1.75 to -1.00 D; Group C: Cylinder degree ≤-2.00 D;