Worth four dot test

The Worth four dot test is a binocular vision test that assesses fusion and suppression at near and distance. It uses a flashlight with four dots (one red, two green, one white) and red-green anaglyph glasses.  Patients report the number of dots seen, indicating fusion, suppression, or diplopia.
Seeing 4 dots (1 red, 2 green, 1 white/yellow):
– This indicates normal binocular fusion and flat fusion.
Seeing 2 dots (2 red):
– Indicates suppression of the left eye
Seeing 3 dots (3 green):
– Indicates suppression of the right eye
Seeing 5 dots (2 red on one side, 3 green on other side):
– Indicates diplopia
– If red dots are on the right, it suggests an exotropia