Around the year 1752, eyeglass designer James Ayscough introduced his spectacles with double-hinged side pieces. The lenses were made of tinted glass as well as clear. Ayscough felt that white glass created an offensive glaring light, that was bad to the eyes. He advised the use of green and blue glasses. Ayscough glasses were the first sunglass like eyeglasses, but they were not made to shield the eyes from the sun, they corrected for vision problems.