Several different types of contact lenses are available to
treat vision problems. Consult an eye doctor who is
willing to work with you to select the best type of lens for your needs and
Most hard (rigid) lenses are made of gas-permeable materials
that allow oxygen to reach the
cornea. This reduces problems that may occur when the
cornea does not get enough oxygen. They correct
refractive errors, including
astigmatism, with no distortion.
Soft (silicone hydrogel) lenses are made
of soft, very flexible plastics that absorb water (up to 90% of the lens
weight). Many people find them more comfortable to wear than hard lenses, but
hard lenses usually provide sharper vision. Soft lenses are more fragile than
hard lenses and require more intensive cleaning. Soft lenses that can correct
astigmatism are called toric lenses.
There are two types of disposable lenses:
October 16, 2012
Adam Husney, MD - Family Medicine
& Christopher J. Rudnisky, MD, MPH, FRCSC - Ophthalmology
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