In the Pola mirror procedure, suppression is indicated by what observation?

In the Pola mirror procedure, suppression is indicated by what observation?

• A. The eye turning white disappears.
• B. The eye turning black is the suppressing eye.
• C. The pupil dilates.
• D. The eye that moves fastest is suppressing.

Answer: (B)

In the Pola mirror procedure, suppression is shown by the eye whose image on the mirror appears black. This test uses two differently presented images to each eye, so when one eye is suppressed, its input doesn’t reach conscious perception and the corresponding image on the mirror looks dark or black to the patient. The eye that produces the black image is the one being suppressed by the other eye. The other statements don’t indicate suppression: pupil dilation isn’t a direct marker of suppression, and the eye that moves fastest or the eye turning white would not reliably signal which eye is being suppressed.

In the Pola mirror procedure, suppression is shown by the eye whose image on the mirror appears black. This test uses two differently presented images to each eye, so when one eye is suppressed, its input doesn’t reach conscious perception and the corresponding image on the mirror looks dark or black to the patient. The eye that produces the black image is the one being suppressed by the other eye. The other statements don’t indicate suppression: pupil dilation isn’t a direct marker of suppression, and the eye that moves fastest or the eye turning white would not reliably signal which eye is being suppressed.