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What is long-sightedness (hyperopia)?
"In hyperopia, the eye has too little focussing power for the length of the eye. This means that for the eye to see clearly at any distance, the eye has to focus much harder than the normal eye has to. Most young hyperopes can see clearly in the distance and at normal reading distances, but with effort. Most hyperopes over the age of 50 can't see anything clearly, with near worse than distance, as the eyes lose the ability to focus over time (presbyopia)."
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