Peripheral vision is what you see beyond your direct line of sight. It helps provide a complete sense of your surroundings without moving your head. Jump to Key Takeaways. Within the eye, rods and ...
Impaired vision and blindness are common. About 3.4 million people in the US are blind or visually impaired. Vision is usually measured by visual acuity charts, and normal vision is expressed as 20/20 ...
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