Double-sided pocket vision screener that has 20/800 to 20/20 acuity measurements. Lists Jaeger and point scales of print. Has numbers, tumbling "E", and xo tests as well as a pupil gauge from 2 to 9 mm. Inch and metric ruler on back. Hold 14 inches away. Washable flexible plastic. Measures 6.5" x 3.5". Comes as singles.