|Lea Gratings® Test are an easy-to-use tool for measuring grating acuity of preverbal children and of multidisabled individuals of all ages The test consists of six 20cm (8 inch) gratings at 0.25, 0.5, 1.0, 2.0, 4.0, 8.0 cpcm (cycles per centimeter of surface) and an additional paddle with solid gray surface. This test is made off durable, easy-to-clean plastic paddles printed on both sides. Useable from birth to 18 months. This test is also called Square Wave Grating Stimuli Paddles.
The instruction book is very complete with chapters on: