Color blindness, or color vision deficiency, is a visual impairment where individuals have difficulty distinguishing certain colors. This condition arises from the absence or malfunction of photoreceptor cells in the retina called cone cells, which are responsible for detecting color. There are different types of color blindness, the most common of which include: 1. **Red-green color blindness**: This includes two main types: - **Protanopia**: Reduced sensitivity to red light due to the absence of red cone cells.
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