Specialized Uses of Contact Lenses

There are two types of lenses that serve a different purpose than simply correcting vision. These are orthokeratology lenses and decorative (plano) lenses.

Orthokeratology, or Ortho-K, is a procedure that uses specially designed rigid gas permeable (RGP) contact lenses to change the shape of the cornea. This helps to temporarily improve the eyes' ability to focus on objects and is typically used to correct myopia or nearsightedness.

The most common type of Ortho-k lenses is the one worn at night. These need to be worn for at least eight hours while sleeping for best results the next day. While some people can g the whole day with a clear vision, for others, vision correction may wear off during the day.

The vision correction effect is temporary. If Ortho-K is discontinued, the corneas will return to their original shape and the eye back to its myopic state. You must have a regular schedule to wear the Ortho-k lenses in order to maintain the effect of the treatment and a better vision. Your eye care professional will determine the best maintenance schedule for you.

Decorative (Plano) Contact Lenses

These as the name suggest are decorative in nature and are used to change the appearance of the eye rather than for vision correction. These are called plano, zero-powered or non-corrective lenses. They can change the color of a person's eyes or the appearance of the person's face by giving it a completely different look. Read more on Types of Colored Contact Lenses.

Even though these decorative lenses don't correct vision, they're regulated by the FDA, just like corrective contact lenses. They also carry the same risks of conjunctivitis, corneal ulcers, corneal abrasion and vision impairment to the eye, if proper care is not taken. The same procedures of getting an eye exam, valid prescription and buying them from a licensed professional are required for getting decorative lenses as well.

Copyright © 2007 cheap-contacts.org