These two adjustments in the contact lens are very distinct, with a sharp line between them. Even though they may sound hard to use, most people find that they are easy use with a little bit of practice. One type of bifocal lens is the aspheric lens, which have a more gradual change of focus. Both power are in the central area of the pupil, and similar to the concentric lens, your eye will immediately adjust to these lenses and decide on the focus that is best to use. If you have astigmatism, you can wear either glasses or contacts. Astigmatism is an odd cornea shape that impairs vision, common with older people. Although most people think that only glasses will correct this problem, contacts can fix the problem as well. No matter which one of the two you decide to go with, you are sure to get the vision you need. You should always keep some rewetting drops or saline with you at times, just in case your eyes start to dry out. If you are new to contact lenses, you should ask your optician or staff any questions that come to mind. Normally, after you have been fitted for contact lenses, the optician and his staff will show you how to put your contacts in, how to care for them, and anything else you need to know about them. You can find lenses that enhance the natural color of your eyes, lenses that enhance your look, and many others. There are also Halloween contact lenses as well, which are great for Halloween or other times when you want to look different. With non prescription contact lenses, you ll have the choice of daily wear and disposable lenses. This is all about preference, and what you feel is the best for you. If you have the money to spare, you would be better off getting a pair of brand name contacts. On the other hand, if you are on a limited budget, cheap contact lenses would do you good - at least until you get the money to buy one of the better brands. If you are looking to get fitted for contacts, you should let your optometrist know up front that you are interested in getting contacts. When you first begin with your eye exam, your optometrist will first examine the health of your eyes. Your eye doctor will also want to know why you want contacts, if you have any known problems with your eyes, and what you hope to get from your visit.