Astron's version of the Maddox occluder. Slightly sharper dispersion line
Occluder, long handle, black
Maddox Rod, short handle (12cm)
Occluder, long handle, white
An opaque occluder on handle for cover testing.
Eye movements of the occluded eye can be monitored during the test.
Occlusion is < 20/300.
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