Table 3.

Unpaired rank sum, 2-sided Mann-Whitney U (Cronbach alpha=.05) for ratings of images taken with Google Glass and Nikon D3200 reflex camera for each group for each of the 4 assessed parameters.

Assessed parameters	Group A			Group B			Group C
	z score	P value	z score		P value	z score		P value
Region of interest	−20.211	<.001	−26.771		<.001	−44.398		<.001
Sharpness	−26.468	<.001	−29.412		<.001	−37.705		<.001
Overall color settings	−25.177	<.001	−38.475		<.001	−40.931		<.001
Brightness	−26.786	<.001	−28.283		<.001	−31.452		<.001