Table 1. Epidemiological characteristics in the medical students population.

		N	Percentage %
Sex	Male	96	24.2%
	Female	301	75.8%
Contact lens use	Yes	82	20.7%
	No	315	79.3%
Allergies	Yes	130	32.7%
	No	267	67.3%
Systemic diseases	Yes	15	3.8%
	No	382	96.2%
Smoking	Yes	90	22.7%
	No	307	77.3%
Contraceptive pills	Yes	27	6.8%
	No	370	93.2%