Table 1.

Fit parameters relating observed variables to viewing distance.

	Offset (cm)	Slope (no unit)
Natural distance vs. height, laptop	−18.5	0.41
Natural distance vs. height, external	37.4	0.13
Natural distance vs. height, screen types combined	−18.3	0.43
Arm's length distance vs. height, laptop	−3.5	0.40
Arm's length distance vs. height, external	7.4	0.31
Arm's length distance vs. height, screen types combined	13.4	0.29
Natural distance vs. blind spot position, laptop	15.9	3.22
Natural distance vs. blind spot position, external	3.1	4.08
Natural distance vs. blind spot position, screen types combined	11.4	3.57
Natural distance vs. blind spot position, screen types combined, no offset	N/A	4.44