Table 2. Descriptive statistics among the 3 groups of internet addictors.

Variables	Mild internet addiction n=242 (65%) (Mean±SD)	Moderate internet addiction n=106(48%) (Mean±SD)	Severe internet addiction n=24(7%) (Mean±SD)
Age (Years)	19.80±1.91	20.02±1.97	22.25±1.45
Internet addiction score	32.06±9.94	56.39±6.84	86.67±5.16
Duration of internet usage (hours)	6.35±2.34	6.65±2.74	12.92±1.74
Right eye Critical fusion frequency(Hz)	27.54±2.87	25.27±3.03	24.71±2.73
Left eye Critical fusion frequency(Hz)	27.2±2.59	25.49±3.19	24.79±2.86
Average Critical fusion frequency(Hz)	54.74±5.14	50.76±5.97	49.5±5.48