Question

Patient was shown image A along with image B. Image C was visualised. Likely diagnosis?

• A. Lt eye suppression
• B. Rt eye suppression
• C. Crossed diplopia
• D. Uncrossed diplopia

Hint:

Worth four-dot test: seeing only the green lights means the red-goggled eye is being suppressed — note which eye has the red filter.

Answer 1

The Correct Option is B

Step 1: Recognise the test. The picture shows the Worth four-dot test, used to assess binocular single vision, suppression and diplopia. The patient wears red-green goggles (red over one eye, green over the other) and looks at a panel of four lights - one red (top), two green (sides) and one white (bottom).

Step 2: Understand the colour logic. The red filter lets the eye see only the red light(s); the green filter lets the eye see only the green light(s). The white light is seen as red or green depending on which eye is dominant. So the number and colour of dots perceived tells us the binocular status.

Step 3: Interpret image C. Image C (the perceived result) shows only the green dots - the red dot from the red-filtered eye is not perceived. Seeing only the green lights means the eye behind the green filter is dominant and the eye behind the red filter is being suppressed. In this question the red goggle is over the right eye, so absence of the red dots means the right eye is being suppressed.

Step 4: Confirm and exclude. Perceiving only green dots = suppression of the red-goggled (right) eye, so B is correct. Left eye suppression would show only the red dot(s); A is wrong. Diplopia in the Worth test shows all five lights (two red + three green = five spots): crossed diplopia in exotropia and uncrossed diplopia in esotropia - but here only green dots are seen, not five, so C and D are wrong.

Final answer: Option B - Right eye suppression.