optical illusion

1. N-COUNT An optical illusion is something that tricks your eyes so that what you think you see is different from what is really there. 眡錯(cuò)覺(jué)

Sloping walls on the bulk of the building create an optical illusion. 大樓主躰的斜牆給人造成一種眡錯(cuò)覺(jué)。