Difference between revisions of Close-up glasses
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→When are differentials worn
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To determine if a close up activity is hurting your vision with the glasses you are using (differentials or normalized), it helps to have a point of comparison (like a line on a snellen chart), and to compare against that reference point before and after the activity in question. | To determine if a close up activity is hurting your vision with the glasses you are using (differentials or normalized), it helps to have a point of comparison (like a line on a snellen chart), and to compare against that reference point before and after the activity in question. | ||
''' Example scenarios for differentials ''' | |||
Read a book with differentials. Use your computer with differentials. | Read a book with differentials. Use your computer with differentials. | ||