Master of Illusions

Published: 2 June 2022

Interactive illusions to challenge your perceptions, University of Glasgow

Welcome to The Illusions Index!

Our senses are remarkable. They have evolved to enable us to accurately perceive a huge variety of things in very different conditions. However, occasionally our senses let us down, and we fail to perceive the world accurately. The resulting illusions give us great insight into how our senses work, and how they usually manage to do so astonishingly well.

Illusions intrigue us. It is fascinating to observe our senses getting things wrong, and to continue to do so, even when we know the nature of the illusion. And it is intriguing to ponder what we aware of, when we seem to be aware of something that isn’t there in the world in front of us.

The Illusions Index is a fully searchable interactive curated collection of illusions brought to you by the Centre for the Study of Perceptual Experience (CSPE). We hope that you enjoy discovering the illusions and the nature of your own perception!

Visit The Illusion Index

Once you’ve spent some time exploring the site, be sure to try our Master of Illusion quizzes. If you pass, you’ll be awarded a Master of Illusion certificate.

Try the Master of Illusion quizzes


At the CSPE, we have various research projects related to illusions. With ongoing projects on Virtual Reality and on Augmented Reality, two technologies that generate ground-breaking types of perceptual illusions.

Find out more about CPSE research projects

CSPE have published numerous publications on illusions, which can be founds via our personnel page

The CSPE also organize the Illusion of the Fortnight Seminar Series, a bi-weekly series that features presentations and discussions about recent research on illusions. 

Visit the website for more info on upcoming seminars

First published: 2 June 2022