Every time when you go shopping for contact lenses the goal is to purchase them cheap and with good quality. If you do not buy your lens from your eye care professional, you have to pay attention when you choose the lenses on your own. 82 percents of American lens wearers use soft lenses while 18 percent use rigid lenses. The choice should be always made by an optometrist and not by yourself.

    Rigid contact lenses are easier to handle but they are not as comfortable as soft contact lenses. You may need almost one month to get used with them. The great advantage of soft contact lenses is that they are able to hold up to 60% water and this way they increase the oxygen permeability. But the water increase also the fragility quotient as well.
   
    The expiration date of the contact lenses is usually written on the box. If it is not written on the box government regulation sets a one year date. Also the eye care specialist may recommend you to replace the lenses before expiration date if it determines a medical reason for contact lenses replacement.
   
    Rigid contact lenses give you a more clear vision than soft lenses but it is recommended to have a rest for your eyes each night. The maximum period of time to wear continuously contact lenses depends on the lens type and on your eyes tolerance overnight.
   
    You can buy contact lenses from your eye care specialist, but nowadays it become very easy to order online any kind contact lenses, for lower prices, and sometimes with discounts. But don`t forget to get your contact lenses prescription before you make your online order, otherwise, the contact lenses may damage your eyes instead of helping you to see better.