Table 1. Demographic characteristics of the study sample.

	N (%)	Valid N
Gender:		1356
Female	950 (70.1%)
Male	405 (29.9%)
Age:		1356
18-30	882 (65.1%)
31-40	208 (15.4%)
41-50	162 (12.0%)
51-60	91 (6.72%)
above 60	12 (0.89%)
Education:		1356
Primary	59 (4.35%)
High school	377 (27.8%)
Bachelor degree	920 (67.8%)
Monthly income:		1356
< 5000 SAR	702 (51.8%)
5000 - 15000 SAR	434 (32.0%)
> 15000 SAR	219 (16.2%)
Frequency of visiting ophthalmologist:		1356
Never	314 (23.2%)
When needed	926 (68.3%)
Regularly	69 (5.09%)
Other	47 (3.47%)
Sight problem that requires contact lenses:		1356
No	659 (48.6%)
Yes	697 (51.4%)
Duration of using glasses:		1356
Never	603 (44.5%)
Less than a year	145 (10.7%)
1 to 5 years	214 (15.8%)
5 to 10 years	193 (14.2%)
More than 10 years	201 (14.8%)
Contact lens use:		1356
Never	710 (52.4%)
Previous user	441 (32.5%)
Current user	205 (15.1%)