Table 1.

Age, refraction and functional data according to gender and myopia severity

	N (%)	Age Mean ± SD	Sphere Mean ± SD	Visual impairment % [95% CI]	Blindness % [95% CI]	Visual impairment or blindness % [95% CI]
Myopes	198 641 (100.00)	34 ± 15	−2.63 ± 2.21	0.54 [0.51–0.57]	0.53 [0.50–0.56]	1.07 [1.02–1.11]
Gender
Females	110 777 (55.77)	34 ± 15	−2.73 ± 2.29	0.55 [0.50–0.59]	0.52 [0.48–0.56]	1.06 [1.00–1.12]
Males	87 864 (44.23)	35 ± 15	−2.50 ± 2.10	0.53 [0.48–0.58]	0.54 [0.49–0.59]	1.07 [1.00–1.14]
Myopia class
Mild myopia	131 001 (65.95)	34 ± 15	−1.41 ± 0.70	0.37 [0.33–0.40]	0.53 [0.49–0.57]	0.89 [0.84–0.95]
Moderate myopia	51 920 (26.14)	35 ± 14	−4.05 ± 0.82	0.45 [0.39–0.51]	0.49 [0.43–0.56]	0.94 [0.86–1.03]
High myopia	13 355 (6.72)	36 ± 14	−7.20 ± 1.03	1.21 [1.03–1.41]	0.44 [0.34–0.57]	1.65 [1.44–1.88]
Very high myopia	2365 (1.19)	41 ± 15	−13.00 ± 3.31	8.44 [7.34–9.63]	1.66 [1.18–2.26]	10.10 [8.91–11.39]

Myopia severity in the left eye was defined as mild (−0.5 to −3 D), moderate (−3 to −6 D), high (−6 to −10 D) and very high (more than −10 D). Vision impairment and blindness were defined as best‐corrected visual acuity (VA) for the better eye strictly less than 0.5–0.05 included and strictly less than 0.05, respectively.