Color Vision
Color vision testing checks how well a person can see and distinguish different colors. It helps identify color blindness (color deficiency), which means someone may have trouble seeing certain colors correctly.
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How Does Color Vision Work?
The retina in your eye has special cells called cones that detect color. There are three types of cones:
🔴 Red-sensitive cones
🟢 Green-sensitive cones
🔵 Blue-sensitive cones
When these cones don’t work properly, a person may mix up colors or have difficulty seeing shades correctly.
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Types of Color Vision Deficiencies
Red-Green Deficiency (Most Common) – Trouble seeing the difference between reds and greens.
Blue-Yellow Deficiency (Less Common) – Difficulty distinguishing blues from yellows.
Total Color Blindness (Rare!) – Seeing only in shades of gray.
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Why is Color Vision Testing Important?
🔹 In School: Helps identify students who may struggle with color-coded learning materials.
🔹 In Future Careers: Some jobs (like pilots, electricians, and designers) require strong color vision.
🔹 In Daily Life: Helps avoid confusion when reading signs, matching clothes, or cooking food.
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How is Color Vision Tested?
We use special equipment called the Keystone VS-V that shows various images that are difficult to read with different types of color vision deficiencies.
