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