If you think those cheaper sunglasses are doing their job, think again.

Research finds that cheaper sunglasses need to be replaced often to provide the UV protection needed to protect you eyes.  With inexpensive sunglasses, the UV protection is usually a coating that is sprayed on.  After time, that coating deteriorates.  Many times the UV coating is already compromised at the point of purchase due to being exposed to sunlight and human touch when in the store.