Welcome to our store! Fully Filtered: Our Worth Four Dot Test Light features pure red and green colors, while other colors are completely filtered out. The red and green colors are complementary, effectively preventing detection deviation. Applicable: Our Worth Four Dot Test Kit is used for clinical testing of eye suppression and amblyopia, and it can determine the type of color vision deficiency. Test: Our 4 Dot Test Light Kit is used for clinical testing of eye suppression and amblyopia, and it can determine the type of color vision disorder, ensuring your satisfaction. Check for Color Blindness: The flipper design is simple yet very practical to use, helping you test for color blindness and color weakness, with adjustable interpupillary distance. Scenes: This visual function testing tool can improve visual clarity and make your eyes more comfortable, suitable for optometry clinics, optical shops, etc. Item Type: Worth Four Dot Test Light Material: ABS Battery: Li-ion battery 1200 mah (built-in) Product Function: Wear red and green glasses to observe the Worth Four Dot Light, and use the aura of complementary colors to separate the two eyes, in order to determine whether the two eyes have monocular inhibition and unite the visual function under the condition of separation. Package List: 1 x 4 Dot Test Light 1 x Battery Charger 1 x Instruction Manual 1 x Storage Box 1 x Flipper 2 x Red Green Lenses