Digital Device Use, Computer Vision Syndrome, and Sleep Quality among an African Undergraduate Population

Table 2

Digital device use behavior of study participants.

Digital device use behavior		Frequency (%)
Years of digital device use	<5	144 (39.78)
	5–10	91 (25.14)
	>10	127 (35.08)
Duration of digital device use per day (hours)	<3	100 (27.62)
	3–6	152 (41.99)
	>6	110 (30.39)
Breaks during digital device use	Yes	275 (75.97)
	No	87 (24.03)
Length of break (minutes)	<20	148 (53.82)
	>20	127 (46.18)
Voluntary blinks during digital device use	Yes	201 (55.52)
	No	161 (44.48)
Digital device brightness/contrast adjustment	Yes	296 (81.77)
	No	66 (18.23)
Glare experience	Yes	126 (34.81)
	No	236 (65.19)
Antiglare device use	Yes	50 (13.81)
	No	312 (86.19)