Table 1. Characteristics and clinical history of participants (n=329).

Parameter	Category	Frequency	Percent
Gender	Male	185	56.1
	Female	144	43.6
Age	1-6 y	59	17.9
	7-12 y	78	23.6
	12-18 y	192	58.5
Chronic diseases	Yes	29	8.8
Use of daily medications	Yes	26	7.9
Medical/surgical eye treatment	Yes	29	8.8
Eye surgery during the last 6 months	Yes	13	3.9
Current conjunctivitis	Yes	20	6.1
Diagnosed with any eye disease	Yes	55	16.7
Prescribed eyeglasses?	Yes	102	30.9
Dry eye while using electronic	Yes	75	22.8
Allergies	Yes	76	23.0
Use of any anti-allergic medication	Yes	50	15.2