Seven strange stories of intriguing optical illusions.

The Diamond Lens by Fitz James O'Brien

The Devil's Spectacles by Wilkie Collins

The Secret of the Smoked Spectacles by William Le Queux

My Black Mirror by Wilkie Collins

The Man who was Blind by Edwin Pugh

A Coincidence by A. J. Alan

Titbottom’s Spectacles by George William Curtis