A study finds that 17% more Americans have myopia than 30 years ago. Close-up computer work could be a reason.

For an increasing number of Americans, life’s a blur.  That’s according to a population-based study published Monday showing that rates of myopia — difficulty seeing distant objects — are soaring. The trend is matched in many other countries, causing eye doctors to wonder what could be causing the decline in human vision.

Some suspect both an increase in our close-up work time (think computer use) and a decrease in time spent outdoors.

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