Digital Test Chart

S Snellen Chart

Q ETDRS Chart

P Picture Chart

N Number Chart

D Duochrome Test

C Cross-Cyl Dots

M Maddox Rod

F Mallett Unit (Fixation Disparity)

Z Refresh Page

H Isolate Row

I V Isolate Letter/Col

A Show All (Exit Isolation)

↑ ↓ Page / Row / Duo / C-Cyl / Mallett-V

← → Row / Letter / Mallett-H

R Toggle Random Mode

SPACE New Random Chart

Esc Welcome Screen

Shift+X Open Settings

9 3 8 2 5 4

Patient wears red/green glasses. Report if either coloured line appears broken or offset from the box.

O X O

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