Made from hard, durable rubber, the LED Three Character from Gulden is lightweight and virtually unbreakable. Includes two size D batteries, the red/green spectacles, and instructions.
Purchase the LED Three Character Test from Gulden. This test is a variant of the Worth Four Dot Test, which has been a standard in eye care since the turn of the 20th century. This test is more appropriate for children than the Four Dot Test. Includes red green glasses and batteries.