Specification:
Item type: 4-point red and green light glasses
Material: ABS
Built-in battery: 1200mAh rechargeable lithium-ion battery
Product function:
1. Wearing red and green glasses to observe the four-point light, the use of color complementarity of this situation, the separation of the two eyes. 2. To determine if there is visual failure in both eyes when monocular inhibition is separated at the same time.

Application:
1. The flashlight usually has four holes on the about 0.4 inch in diameter. They are organized in a shape. The holes are arranged so that the top hole shows only red light, the left and right shows only green light, and the bottom hole shows white light.
2. When looking into the flashlight with red and green glasses, a patient with normal will see the four holes directly in both eyes. If the patient has oppressed eyes, he sees two or three holes. If the eye does not have a fused image, the patient sees five holes (if the eye sees two white holes, two separate, then two holes are not fused).

Package List:
1 x Four point light
1 x storage box
1 x left red glasses clip

1 x user manual
1 x glasses
1 x battery charger