[The Bifosolar Ideal light-protection spectacles (author's transl)].
Bifosolar glass is made without heating, therefore the phototropic material keeps unchanged its original light sensitivity. A further development of the Biofosolar glass leads to the "Bifosolar Ideal dual strenght glass". This can be used in reduced visual acuity by combining with additional corrections up to 8.0 dioptres. The author describes the manufacture and the technical data of the various Bifosolar glasses.
D005139:Eyeglasses; D005860:Germany, West; D006801:Humans
Bifosolar Ideal.