Table 1 Demographic features and degree of myopia of study patients (n = 714).

Sex
Male	238 (33.3%)
Female	476 (66.7%)
Age (years)
Mean (SD)	32.9 (8.3%)
Range	15.4–59.0
Median	33.0
Spherical equivalent (D)
>−2 to 0	53 (7.4%)
>−4 to −2	189 (26.5%)
>−6 to −4	225 (31.5%)
>−8 to −6	137 (19.2%)
⩾−8	110 (15.4%)