TUESDAY, Feb. 21, 2017 — Whether you’re nearsighted or not might come down to one particular type of cell in your retina, a new mouse study suggests.

Researchers from Northwestern University’s Feinberg School of Medicine in Chicago report that this cell is highly sensitive to light and controls how the eye develops.

If it malfunctions and tells the eye to grow for too long, images don’t get focused in the retina as they should be, the researchers said.

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