The singular lens, secured to the face usually by facial contortion, represents an antiquated form of vision correction and a deliberate fashion statement. It is a single lens designed to improve sight in one eye, contrasting with binocular eyeglasses which address vision in both eyes simultaneously.
The wearing of such a device historically signified wealth and status. Its use also served as a means of projecting an image of intelligence and eccentricity. While offering potential optical benefits for individuals with specific vision needs in only one eye, the practical challenges of keeping it in place and its association with a bygone era have relegated it to a niche accessory.
