Contact Lenses, also known as optical lenses, are very thin optical lenses placed directly onto the cornea of the eye. They can be used for corrective vision, such as those sold by prescription eyewear companies, or for aesthetic or therapeutic reasons, including ones prescribed by Optometrists. Many people wear contact lenses to improve their vision, for either corrective or therapeutic reasons.
Contact Lenses can only correct a person’s vision and cannot correct any problems that might be present in other areas of the visual system. Therefore, before a patient starts to wear contact lenses, it is important for the patient to have his or her eyes tested by an expert optometrist to determine the exact eye condition that requires corrective lenses. A patient may choose to wear corrective lenses to one eye and leave the other untreated, provided that the optometrist determines that the visual improvement provided by the corrective lenses is appropriate for each eye. For example, people with astigmatism will not usually benefit from wearing contact lenses to fix their vision problems.
The most common conditions for which people wear contact lenses are farsightedness (also known as nearsightedness) and nearsightedness. Both conditions affect how far an object can be seen, as well as the distance to which it can be viewed clearly. Farsightedness commonly results from the condition called strabismus (the inability to see the near and the far blurted), while nearsightedness results from the condition called presbyopia, which means “of age.”
There are two main types of contact lenses – gas-permeable lenses, which are rigid gas permeable, and soft gas permeable lenses. Gas-permeable lenses allow oxygen to flow through their interior, while soft gas-permeable lenses allow moisture to escape from between their interior and external surfaces. Because both types of contacts differ in the amount of oxygen they allow to pass through their lenses, they have different effects on eye health. Gas-permeable lenses require more frequent eye examinations than soft gas-permeable lenses do. Also, gas-permeable lenses often experience stronger adverse affects from frequent wearing.
One of the most important factors in the proper selection of contact lenses is the patient’s individual eye health. If you are an adult, your optometrist is best able to determine which types of lenses will help improve your vision most effectively. In addition, the doctor can help you select an appropriate design, based on your specific eye health needs. For example, if your refractive errors are too great, you will probably be better off with a hard contact lens than a soft one.
If you are in need of cosmetic contact lenses, you should visit an eye doctor and discuss the benefits and risks associated with them. The eye doctor can help you determine whether you are a good candidate for wearing contacts, depending upon your own personal situation. He may also be able to determine the best course of action for addressing any complications that you might encounter. Contact lenses provide an excellent alternative to other forms of visual correction.