The lenses on these lightweight glasses are prisms that change the normal line of sight without any distortion. You can be flat on your back and still enjoy reading and TV as though the image was straight ahead. They work well over prescription glasses too (we even tested them with bifocals!) No more neck strain, just easy viewing.
For more Informations
PERRET OPTICIENS 4, Ave Cardinal-Mermillod CH-1227 CAROUGE/GENEVA SWITZERLAND
Tel.: +41.22.342.17.42 Fax.: +41.22.300.08.84 URL: http://www.perret-optic.ch Email: info@optics-shop.com
