In a restaurant, at an important meeting, at home... How many times do people forget or misplace their reading glasses? Much too often! These magnifying optic cards come to the rescue! Magnifying cards incorporate two optical lenses, are the size of a credit cards and come in 5 different strengths: +1.00, +1.50, +2.00, +2.50 and +3.00. Display also comes with a convenient eye tester. There are 50 cards per display (10 of each power).