It is essential that the lens remains transparent in order for clear vision. When cataracts occur, the lens becomes cloudy or opaque, preventing light from passing clearly to the retina. Cataracts often occur as a person ages but can develop as a result of other medical conditions. A doctor will...
22 percent for females and 16 percent for males, CDC says
Athletic shoes are made in several different ways, according to the American Orthopaedic Foot and Ankle Society. You should try to find out how a shoe was constructed to see if it's a good match for your foot type. Here are the three main shoe constructions:
Slip-last. This shoe is made by sewing together the upper part of the shoe and then gluing it to the sole. The result is a lightweight, flexible shoe.
Board-last. For this shoe, the upper part of the shoe is sewn to a cardboard-like material. Board-lasted shoes are good for people with flat feet.
Combination-last. This shoe is slip-lasted in the front and board-lasted in the back. The result is a heel that's stable and a front that's flexible.