Topcon PixelChart PC-50S - Page 35

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INDICATION OF CHART
ETDRS chart
The instrument indicates the ETDRS chart where the visual acuity is changed in turn from the upper-
column.
Select the ETDRS chart icon on the chart page, and this chart is displayed. There are two types of
ETDRS chart as shown below.
The visual acuity values in the ETDRS chart are shown below. A fraction is displayed in ( ).
Top column 0.32 (20/63) (6/18.9)
second column 0.4 (20/50) (6/15)
Third column 0.5 (20/40) (6/12)
Fourth column 0.63 (20/32) (6/9.6)
Fifth column 0.8 (20/25) (6/7.5)
Sixth column 1.0 (20/20) (6/6)
Seventh column 1.25 (20/16) (6/4.8)
Eighth column 1.6 (20/12.5) (6/3.75)
Ninth (bottom) column 2.0 (20/10) (6/3)