order to understand how refractive surgery helps to correct vision,
patients must understand how vision works. There are many factors that
affect how clear or blurry an object appears to be. If an image is out
of focus, it is usually due to a misshapen cornea.
Emmetropia - When the shape of the cornea is normal, visual images are focused directly on the retina. This condition is called emmetropia.
A patient with emmetropia will not have difficulties focusing on
objects at any distance. Emmetropia does not require refractive
treatment in any form.
Myopia - When the cornea is too steep, visual images are focused in front of the retina. This condition is called nearsightedness or myopia.
A patient with myopia will be unable to see objects at a distance, such
as street signs, chalkboards, and television. Treatments for
nearsightedness include glasses, contact lenses, or refractive surgery.
Hyperopia - When the cornea is too flat, visual images are focused behind the retina. This condition is called farsightedness or hyperopia.
A patient with hyperopia will be able to see objects at a distance, but
will have trouble focusing on objects up close, like books or
newspapers. Treatments for farsightedness include glasses, contact
lenses, or refractive surgery.
- When the cornea is curved more in one direction than another, visual
images will not be focused properly on the retina. This condition is
called astigmatism. A patient with astigmatism will have
difficulties focusing on objects at any distance. In addition,
astigmatism may cause eye strain and headaches. Treatments for
astigmatism include glasses, contact lenses, or refractive surgery.
- When the lens of the eye loses its flexibility, visual images will
not be focused properly on the retina. This condition occurs around the
age of 40 and is called presbyopia. A patient with presbyopia
will have difficulty focusing on objects up close, like books or
newspapers. Treatments for presbyopia include glasses (bifocals),
contact lenses (bifocal or monovision), or monovision refractive
BONNER EYE CLINIC
SPRING INTO SUMMER
*** FREE ***
LIFETIME VISION PLAN
YOU MUST HAVE YOUR LASIK EXAM AND YOUR PROCEDURE SCHEDULED BY AUGUST 31, 2013
Currently there are no scheduled seminars.
Call us for a Free LASIK screening and future LASIK seminar dates
Grand Rapids Office
is a type of refractive surgery designed to reshape the cornea and
produce clearer vision. 95 percent of patients achieve 20/40 vision or
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