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Use bifocal or varifocal lenses may relieve the asthenopia.

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#1 (permalink)

09-08-2010, 12:44 PM

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Join Date: Jan 2010

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Use bifocal or varifocal lenses may relieve the asthenopia.

In fact, bifocal eyeglasses are better for students, using this kind of eyeglasses could help them to relieve the asthenopia of eyes. Especially, the students read books for late night.

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