| Answer | Crossword Clue |
|---|---|
| OEILS | Trompe l'.. (optical illusions) |
| OEIL | Trompe l'... (optical illusion) |
| LOEIL | Trompe ..... (optical trick) |
| MIRAGES | Optical illusions. |
| ESCHER | Dutch artist known for optical illusions |
| ESCHER | Dutch artist noted for optical illusions |
