The high quality yellow coloured filter glasses can be worn independently or over normal spectacles.  They enhance contrast, filter out harmful ultra violet light and reduce dazzling and photosensitivity.  They are especially suitable for outdoor use. The spectacles fit closely to the head with a darkened upper edge which helps to shield the eyes from light.  The yellow filter has an absorption range which ensures a good transmission of light through the filter and absorbs UV elements of light.  These spectacles are particular suited for contrast enhancement, Macular Degeneration, Optic Atrophy, Albinism and Pseudophacia.