Antique Early 19th Century Eye Glasses Spectacles Green Octagonal Lenses Optical in | eBay
Vintage Old Rare Round Green Glass Safety Glasses leather Sides Spectacles 1900
The On-Line Museum and Encyclopedia of Vision Aids. Includes a chart of known examples of glasses through the ages..
Antique Vintage Civil War Era Blue Lens Eyeglasses Sunglasses Adjustable Temples
Cool Georgian c.1800-10 silver metal eyeglasses with double cobalt blue glasses, folding sides and arms. These eyeglasses were used as sunglasses or as protection against the light of the earliest Argand lamps. Probably American. Signed : .. MITH.. SILI.. (Prob. Smith, not easily readable).
Antique 18th C Iron Spectacles Eyeglasses w Double Hinged Temples Round Loop End
Antique 18th C Iron Spectacles Eyeglasses w Double Hinged Temples Round Loop End | eBay
The first to start experimenting with tinted lenses was James Ayscough in the 18th Century. These however were not sunglasses, but corrective devices. Ayscough believed blue- or green-tinted glass could correct for specific vision impairments, while yellow/amber and brown-tinted spectacles were prescribed to people with syphilis in the 19th century because sensitivity to light was one of the symptoms of the disease.