NEARSIGHTEDNESS

Also known  as myopia, this is the ability to see up close
throughout life without glasses.   However, these individuals
require distance glasses their entire life.  As noted in the
diagram, light rays from a distant target are focused in front
of the retina.  These individuals require minus (-) lenses in
front of the eye which can range anywhere from –.50 to  
–14.00.  Any prescription higher than–4.50, however, will
probably require the patient to hold things to close to the
face in order to see them clearly and will be more comfortable
with his glasses on. This condition results from the eye being
too long (the longer the eye the higher the minus lens
required).



Surgical Options:

LASIK    PRK    MULTIFOCAL LENS IMPLANT
Terry Hemelt, MD
Andrew Benson, MD
Board Certified Eye Surgeons
(985) 643-6355
Established 1983

ASTIGMATISM

This refers to corneas which have an irregular shape. In
people who do not  have astigmatism, the eye has the
regular curvature of a basketball. With astigmatism the eye
has more of the irregular curvature of a football. Note in the
diagram that light rays are focused at all different locations in
relation to the retina.  Therefore, patients with astigmatism
almost always require glasses.



Surgical Options:

LASIK   PRK   Acrysof Toric IOL    
Limbal Relaxing Incisions

FARSIGHTEDNESS

Also known as hyperopia, this is the ability to see up close
and in the distance up until a certain age without glasses.  
When that certain age is reached, the vision will become
blurry at distance and near.  As noted in the diagram, light
rays from a distant target are focused beyond the retina.  
These patients require a plus (+) lens in front of the eye to
see clearly which can range from +.50 to +14.00. This
condition results from the eye being too short. The shorter
the eye the higher the plus lens required and the earlier in life
the individual will require glasses.



Surgical Options:

LASIK   PRK    MULTIFOCAL LENS IMPLANT

PRESBYOPIA  

This is the most difficult refractive error for people to understand. This term refers to the normal aging
process whereby the eye loses it's ability to
accommodate (usually around age 40).  At this point,
patients with good distance vision without glasses will require reading glasses and those who have been
wearing glasses for distance vision will need to add a bifocal to their glasses prescription to help them
see up close.

Surgical Options:

MULTIFOCAL LENS IMPLANT
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Slidell, LA