Table 1.

The demographics of the study population according to the Amsler-Krumeich classification.

Characteristic	Control	Grade 1	Grade 2	Grade 3	Grade 4
Age (years)	36.9 ± 12.5	34.1 ± 18.0	35.4 ± 14.1	35.4 ± 15.0	39.4 ± 14.6
LogMAR UCVA	0.76 ± 0.66	0.48 ± 0.55	0.94 ± 0.60	0.91 ± 0.56	1.27 ± 0.58
LogMAR BSCVA	−0.17 ± 0.04	−0.03 ± 0.12	0.15 ± 0.32	0.23 ± 0.32	0.46 ± 0.38
Manifest sphere (D)	−3.07 ± 3.44	−2.32 ± 3.52	−4.74 ± 4.63	−4.23 ± 3.99	−4.67 ± 5.43
Manifest cylinder (D)	−0.67 ± 0.73	−2.10 ± 1.77	−3.40 ± 1.86	−3.24 ± 1.55	−2.68 ± 2.61
Flat keratomtry (D)	43.1 ± 1.2	43.2 ± 1.7	46.2 ± 3.0	49.8 ± 4.7	52.6 ± 4.6
Steep keratometry (D)	44.6 ± 1.5	46.3 ± 2.1	51.0 ± 3.8	55.7 ± 5.0	58.8 ± 6.4

LogMAR, logarithm of the minimal angle of resolution; UCVA, uncorrected visual acuity; BSCVA, best spectacle corrected visual acuity; D, diopter.