The Impact of Electronic Reading Devices on Reading Speed and Comfort in Patients with Decreased Vision

Table 2

Visual acuity group and mean reading speed.

Visual acuity group	N	Book 12PF	iPad2 12PF	iPad2 18PF	Kindle2 12PF	Kindle2 18PF
Good VA (20/20–25)	60	203.6	230.1	220.9	201.0	194.7
Moderate VA (20/30–40)	70	186.9	220.9	234.5	190.6	198.5
Poor VA (20/50–80)	26	127.7	174.3	195.6	131.7	154.5
Very poor VA (20/100–9/200)	11	81.8	101.3	134.7	76.6	91.8

Mean reading speed in words per minute (WPM) for each reading medium at 12-point font (12PF) or 18-point font (18PF), stratified by the visual acuity (VA) group.