Blended Vision for
PresbyopiaAging And Your Eyes
It seems to happen overnight. You suddenly can't read
a menu, see your alarm clock or review the scores on your golf card. Rest
assured, you're not alone. Millions of baby boomers like you are losing
their near vision as part of the natural aging process. In 2009, we find
that the general public could be mislead when speaking about monovision.
Omni vision or blended vision emphasizes that the outcome is binocular
rather than monocular as implied by the term monovision according to Graham
D. Barrett, MD, head of ophthalmology, Sir Charles Gairdner Hospital in
Australia. Furthermore, binocular fusion can occur. He also suspects that
patients compromise of their quality of vision when having multifocal IOL's
is that they are accustomed to poor vision due to cataract and refractive
error.
Current technology seems to indicate that
accommodative IOL's are becoming more and more popular as they simulate
omni or blended vision. At the Shealy Eye Laser Center, we have found
that patients do not readily accept multifocal contact lenses. This is
thought due to the variability and the lack of exact focusing. According
to Robert J. Cionni, MD, director of the Cincinnati Eye Institute in
Ohio, not every patient will be thrilled with presbyopia correcting IOL's.
The most common reason for patients dissatisfaction is residual
astigmatism. Patients are thus candidates for Surface Epi-Laser or Thin
Flap LASIK at the Shealy Eye Laser Center. Other likely etiologies such
as dry eyes, retinal edema, and posterior capsual opacification should be
evaluated before we conclude the presbyopic IOL's are not working
properly.
Why The Loss of Near Vision with Age?
When we turn 40, our eyes begin losing their ability
to easily focus on near objects. This can be the result of two different
conditions:
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The Theoretical Cause of Presbyopia |
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Presbyopia was previously thought to be caused by a
hardening of the lens of the eye, which made it difficult to focus. This
loss of focusing ability occurs in nearly everyone by age 50. You will
become aware of this condition of aging when you notice difficulty reading
due to fuzzy vision. With further aging, the ability to focus near objects
is lost.
However, a revolutionary new understanding to this
age-old problem has been proposed by physicist Dr. Ron Schachar MD, Ph.D. He
has published both theoretical and laboratory data which support the concept
that presbyopia results from physiologic growth of the crystalline lens of
the eye with age. The increase in the size of the crystalline lens reduces
the distance between the edge of the crystalline lens and the ciliary
muscle. Because of this decrease in distance, the ciliary muscle, which
changes the shape of the crystalline lens by traction on the zonules, is
unable to exert sufficient force to alter the shape of the lens. This
results in presbyopia.
Click to view illustration.
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Presbyopia
occurs when the lens inside your eye loses its elasticity, making it more
difficult to read smaller print. This loss of elasticity affects the ability
of the eye to focus close up. This usually occurs between the ages of 40 and
50. Everyone experiences presbyopia at some point as they get older,
resulting in nearsighted people to begin wearing bifocals in their forties,
and those who never needed glasses before may require reading glasses. The
one advantage to mild myopia (nearsightedness) once you begin to be
presbyopic is that you may be able to remove your glasses to read (your
myopia effectively counteracts your presbyopia).
Farsightedness (hyperopia): When the surface of the
eye (cornea) is too flat, changing the way our eye focuses light. Young eyes
are often strong enough to compensate, which is why it may only be a problem
after age 40.
Back to the top.
SELC
Poll Shows Multifocal Preferences & Trends
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In our practice, four out of five
patients prefer Laser Blended Vision.
If you were a 55-year-old emmetrope in 2009, which
technology would you choose?
1. AMO Rezoom: 8%
2. Eyeonics Crystalens: 15%
3. Alcon Acrysof Restor: 5%
4. Blended Vision Thin Flap or Surface Epi-Laser: 67%
5. Other: 5%
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The treatment of presbyopia is developing
presently. It now is being combined with laser and astigmatic refractive
surgery to produce relative independence from reading glasses and
bifocals. Below are listed procedures that have been chosen by
refractive surgeons like myself, to be independent of glasses and
contact lenses.
Testimonials from Leading Refractive Surgeon Ophthalmologists Who Have Had
Presbyopia Correction
Study
Considers Blended Vision Characteristics
To Schedule
Consultation &
Treatment on Same Day
With Dr. Shealy, Give Us a Call at 1-800-644-6393 or
Email Us!
Shealy Eye Laser Center
6036 Trier Road Fort Wayne, IN 46815 ♦
Tel: (260) 486-0065 or (800) 644-6393 ♦ email:
shealy@shealyeye.com
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