Optical Illusions 23: Waves

Optical Illusions 21: Twisted fire place

Optical Illusions 20: The cyclist

Optical Illusions 18: Fencing for Ophthalmologists

Optical Illusions 17: Stairs

Optical Illusion 15: the Royal Agave

(Agave Victoria regineae)

Optical Illusions 14; this time with ducks

 

Optical Illusions 12: Milo sees everything

Optical Illusions 10: Quirky

Optical Illusions 9: In the book shop