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The importance of good eyesight

The top picture shows the view from behind the wheel of a person with average eyesight. Everything is clear, and peripheral vision is adequate. The centre picture shows the effect of long-sightedness, with the foreground blurred and the distant objects in focus. Short-sightedness is even worse, as is illustrated by the bottom picture. Everything ahead of you is dangerously blurred.

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To be an advanced driver you need to become a skilled observer. Good powers of observation, which...