Dr. Mark Lindsay was 5 years old when he first learned that tree trunks were brown. "Up until that point, I believed leaves and trunks were all green. Just lighter and darker shades," Mark said. Mark ...
Deuteranopia is a type of color blindness that affects shades of green. A person may be unable to see greens or distinguish between green and other colors. Color vision deficiencies, also called color ...
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