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Humans have a "resolution limit" - meaning most can't tell the difference between a 4K and 8K ultra-high-definition television.
Eyemart Express reports that adults should have yearly eye exams; children need them starting at 6-12 months to ensure healthy vision and catch issues early.
The findings of a new scientific study show that pollution in the air may be harming youngsters' eyesight.
Short-sightedness, or myopia, affects around one-in-three children and teens, and research suggests that it is becoming more common.
The solution might be as simple as using special eye drops two or three times daily.
