During Worth 4 Dot testing, if three green dots are seen, this indicates suppression of which eye?

During Worth 4 Dot testing, if three green dots are seen, this indicates suppression of which eye?

• A. OD suppression
• B. OS suppression
• C. Flat fusion without suppression
• D. Diplopia

Answer: (A)

Worth 4 Dot uses red-green spectacles and color-coded dots to reveal which eye is contributing to vision. Green dots are seen by the eye with the green filter (OS), red dots by the eye with the red filter (OD), and the white dot is seen by both eyes. If you perceive three green dots, the dot that would be red (the one seen only by the right eye) is missing because the right eye’s input is being suppressed. With the right eye suppressed, the left eye’s green dots (and the shared dot, depending on the test’s presentation) dominate, so the perception aligns with three green dots. Therefore, this pattern indicates suppression of the right eye (OD).

Worth 4 Dot uses red-green spectacles and color-coded dots to reveal which eye is contributing to vision. Green dots are seen by the eye with the green filter (OS), red dots by the eye with the red filter (OD), and the white dot is seen by both eyes. If you perceive three green dots, the dot that would be red (the one seen only by the right eye) is missing because the right eye’s input is being suppressed. With the right eye suppressed, the left eye’s green dots (and the shared dot, depending on the test’s presentation) dominate, so the perception aligns with three green dots. Therefore, this pattern indicates suppression of the right eye (OD).