Visual Sequelae of Computer Vision Syndrome: A Cross-Sectional Case-Control Study

Table 6

Final multivariate logistic regression analysis of factors affecting the occurrence of blurred vision.

Variable	Odds ratio (95% confidence interval)	value
Age/years	1.1 (1.0 : 1.3)	0.02
Commonest used screen
Desktop computer screen	1
Apple smartphone	2.7 (1.2 : 5.7)	0.01
Android smartphone	2.5 (1.3 : 4.7)	0.01
Laptop	2.2 (1.1 : 4.6)	0.03
iPad/tablet/other screens	1.0 (0.3 : 4.1)	0.97
Previous DED diagnosis	2.1 (1.3 : 3.6)	0.004
Refractive errors/wearing	1.9 (1.3 : 2.7)	<0.0001
Poor lighting conditions	2.6 (1.7 : 4.0)	<0.0001
Upper screen edge at/above horizontal eye level	2.0 (1.4 : 3.0)	<0.0001
Close eye-screen distance	2.2 (1.5 : 3.0)	<0.0001
Screen-glare	3.0 (1.5 : 6.2)	0.003