Refractive Vision Problems
The vast majority of vision problems result from imperfect formation of the eye's refractive
system. In order to see clearly, there are a number of eye structures that must develop “just right”
so that we have no need for vision correction. The
cornea is responsible for 2/3 or the focusing
power of the optical system of the eye while the
lens takes care of the other 1/3.
Assuming all else is perfect, these two “lenses” should focus light down to a single point on the
retina. Alternatively, an eyeball that is too
long or too short will also result in improper focusing of light at the retina. As you can see, there
are many ways that even the slightest imperfection in the development of an eye can result in a condition
ametropia, where the eye's refractive
system does not focus light at the proper place (ie. the retina).
Myopia (nearsightedness) is by far the most common
vision problem, afflicting more than 1/3 of the American population. Nearsighted people have
difficulty seeing far away objects clearly. Near vision is quite clear, however.
Learn more about Myopia.
Hyperopia (farsightedness) is the second most
common vision problem, affecting 1 in every 4 Americans. Farsighted individuals have to make their
eyes work much harder to see near objects clearly while distance vision is clear.
Learn more about Hyperopia.
Astigmatism is a common vision problem where
cornea is irregularly shaped such that it is
shaped more like a football than a spherical ball. Eyeglasses or
toric contact lenses with different powers in
two meridians are needed to correct for astigmatism.
Learn more about Astigmatism.
Presbyopia is a normal process of aging;
gradual loss of flexibility of the
crystalline lens such that it loses its
accommodate and to produce clear
vision of near objects.
Learn more about Presbyopia.
Treatment of Refractive Vision Problems
Contact lenses provide clear vision to
people who are
astigmatic. No matter what your vision problem,
chances are, you will be able to find contact lenses to correct it. Enjoy clear vision without having
to wear bulky glasses that restrict your vision!
Learn more about Contact Lenses.
Laser Eye Surgery
Taking vision to the next level!
Laser vision correction has been making
giant leaps, and now offers wavefront Custom LASIK, an unprecedented opportunity for vision that you
have never had before in your life! Laser surgery is an option for people with
Learn more about Laser Eye Surgery.
The mainstay of vision correction is eyeglasses. Over the years, eyeglasses have followed fashion
trends and improved in quality, making them a perfectly acceptable complement or alternative to
contact lenses and
laser eye surgery.
The information provided by KnowYourEyes.com is intended for educational purposes only and in no way
replaces the advice and diagnosis of a licensed eye care professional. KnowYourEyes.com disclaims any
and all liability for injury or other damages that may result from use of the information obtained
from this website.