Comes with a pair of red/green glasses. Lightweight, palm-sized. This ergonomically designed handheld device features 4 peripheral porthole LEDs and 4 central porthole LEDs with a constant brightness. The central porthole lights test for foveal fusion/suppression. A momentary rocker switch allows for peripheral or central testing.
The Worthmore Four Dot Test II is powered by two non-rechargeable embedded batteries with an expected life span of 3-5 years. Ecologically-friendly with every component completely recyclable. Diameter: 2.5″ Thickness: 0.5″