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. Author manuscript; available in PMC: 2007 May 10.
Published in final edited form as: Optom Vis Sci. 2007 Jan;84(1):9–20. doi: 10.1097/01.opx.0000254035.39055.05

Figure 2.

Figure 2

Magnifier movement traces showing horizontal (X) and vertical (Y) positions of a magnifier as it was moved slowly forward to the right along each line of text and then retraced more quickly to the start of the next line. To enhance visibility of details, the vertical axes are on a larger scale than the horizontal axes. (a) Participant A32 using a hand magnifier (EVD 5cm) with a predominantly straight movement during the forward phase and a downward (diagonal) movement during retrace; corrective vertical movements (Vert) were used at the end of the retrace to place the magnifier at the correct vertical position at the start of the next line. (b) Participant A1 using a stand magnifier (EVD 2.5cm) with a downward (diagonal) movement during the forward phase and a predominantly upward movement during retrace; regressive movements (Reg) occurred during the forward phase, and an overshoot (Over) and corrective vertical movements (Vert) at the end of the retrace.