AmandaK(TM) Healthcare Bed Prism Spectacles Glasses, Universal, Myopia Usable, Leopard, M It is beneficial in health of body and mind, and helps people improve the life quality. Get far away from the cervical vertebra, lumbar disease. With it, Easy to enjoy your favorite magazine, book or TV program while lying in bed. Perfect for reading while riding (not driving!) in a car! Perfect for air planes! Great for those who can not get up due to medical conditions. Glasses Size: M, 148*157*31mm.