The Importance of Contact Lens Fitting

Compared to getting a pair of eye glasses, contact lens fitting is quite different and far more complex. Since the lens sits on top of the cornea, getting the right size and measurement is very crucial. Contact lens fitting is for people who just started wearing contacts, those who have switched to a new type of lens on those who need an upgrade for their prescription. Contact lens fittings are performed by eye specialists and eye care professionals. These people will ensure that the contacts lenses you’ll be wearing are comfortable and properly fitted. Contacts that fit poorly can affect vision and can even damage the cornea.
During contact lens fitting, corneal measurement is among the most important factors to consider. Similar to feet and shoe size, the cornea in every individual is different in shape and size. The contact lens must fit the natural curvature of the eye; some would have steep curves while others have flat angles. A device called, keratometer is used the measure the eye surface and curvature of the cornea. When taking the measurements using a detailed photograph of the eye, the keratometer analyzes the cornea’s light reflections and based on this finding, the contact lens size is obtained. If the cornea is hard to fit, further tests are performed. These tests include corneal topography which measures the precise size and shape of the cornea as well as wavefront measurements which can detect vision problems.
Proper contact lens fitting also includes measurement of the pupil’s size, which can be taken using a specialized ruler or an automated measuring device. After getting the proper contact lens fit, and once you’ve started wearing your contacts, the eye specialist will examine and evaluate the fit from time to time. When there are no observable discomforts and complications, follow up visits may not be necessary.