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Glaucoma,
Macular Degeneration, Bletharoplasty,
Diabetic Retinopathy, Dry Eye,
Strabismus, Keratoconus,
Ectropian and Entropian, Pinguecula
and Pterygium
Glaucoma
Primary open angle glaucoma
is the most common form of this eye disease. It causes pressure to build
up within the eye, which may cause damage to the optic nerve. The optic
nerve is essential for transmitting vision to and from the brain. If
glaucoma is not kept under control it can lead to blindness.
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Beginning at age 35, patients
should be tested for glaucoma each year. The procedures that check
for glaucoma include: a slit lamp exam, eye pressure check and
a visual field test (which checks peripheral vision).
To the right is a photograph
of an eye pressure check.
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Many patients retain central vision
while losing peripheral vision long before they notice any loss of sight.
Glaucoma is more common in older people, black people, diabetics and
may be genetic. Life long attention must be maintained to keep glaucoma
under control.
The most common treatment is the
use of eye drops. If the eye drops fail to control the pressure within
the eye, a laser procedure known as trabeculoplasty is recommended.
Controlling the pressure within the eye is of utmost concern for maintaining
good vision. Top
Macular
Degeneration
Macular degeneration forms
in the central retina (back of eye) and causes loss of central vision
of the macula. It is a complicated disease and is not always treatable.
This disease is usually caused by the aging process, which changes the
back of the eye through degeneration of the macula.
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Testing for macular degeneration
includes the use of an Amsler grid that the patient looks at to
see if the lines appear straight and fluorescein angiography (injection
of a dye into the arm) that checks for irregularities in the retina.
An individual with macular
degeneration might see the Amsler grid as shown on the left (rather
than straight lines).
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Macular degeneration can sometimes
be treated with a laser procedure, the use of low vision aids and is
helped, in some cases, with anitoxidant formula vitamins. In some cases,
a new therapy called Rheo Therapy can improve some patients' vision.
Top
Blepharoplasty
There
are a variety of conditions that can cause our eyelids to interfere
with our vision. Most frequently the aging process is the culprit. Excess
skin tissue and/or fat can cause our eyelids to droop or look puffy.
Many times this drooping will actually hinder one's vision by causing
interference with peripheral or side vision. Some people notice that
they have to "raise their eyebrows" in order to see well. Most of the
time this occurs bilaterally, or in both eyes. Individuals with this
condition feel as though they always look tired.
There
are also some injuries and diseases that affect the nerves that go to
our eyelids causing them to not function correctly. This is frequently
seen in just one eye and is referred to as ptosis (pronounced toe' sis).
Sometimes the condition will correct itself as the disease process is
aleviated, but in many cases theptosis will remain.
Through
a surgical procedure known as a Blepharoplasty or Blepharoptosis Repair
(blepharo means eyelid and ptosis refers to the drooping), this condition
may be remedied. Under local anesthesia the patient has the excess skin
and/or fat pads surgically removed. A fine incision is made in the upper
eyelid which follows one of the natural creases. Stitches are put in
which are removed in 1-2 weeks. Although everyone heals a little bit
differently, patients usually experience very little discomfort, but
they do notice temporary swelling and bruising around the eyelids. Again,
this is just part of the healing process and these conditions will go
away. In some situations the puffiness is just in the area beneath the
eyes. This can also cause an unwanted tired or 'older' look to the individual.
Again, through a minor surgical procedure under local anesthetic, the
cause of the puffiness can be removed. This procedure is usually perfomed
through a delicate incision that is made under the eyelid so there is
no visible evidence on the skin. Top
Diabetic
Retinopathy
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Diabetic Retinopathy causes
the delicate blood vessels in the retina (back of eye) to weaken,
enlarge and/or sometimes to burst, leaking blood into the eye.
If this condition persists, loss of vision may occur.
A laser is used to inhibit
the growth of new abnormal blood vessels and reduce the size of
the vessels already abnormally enlarged on the retina. It can
also be used on leaking blood vessels to seal them off.
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Top
Dry
Eye
The aging process changes
the effectiveness of tears in their ability to lubricate the eyes. Moisture
helps eyes see and focus more clearly. Dry eye is a tear deficiency
that makes sight appear as though looking through a dirty window. Sometimes,
the eyes seem more watery, but those tears lack the true lubricant to
keep eyes moist.
Treatments include using artificial
tears, an ointment at bedtime, the use of glasses with side shields
to protect from wind and sometimes inserting a small plug into the duct
at the corner of the eye to keep natural tears from draining. If unchecked,
dry eye can lead to more serious problems of the eye. Top
Strabismus
Strabismus is caused by
the misalignment of the extraocular muscles. This condition prohibits
normal movement of the eyes. As a result, a patient may complain of
double vision (diplopia). Strabismus may also result when one or more
muscles lose their elasticity from scarring.
Surgical repair or tightening
of the damaged muscles may restore alignment. Trauma or other disease
processes may cause strabismus as the result of complete or partial
paralysis (palsy) of muscle function due to nerve damage.
Treatment in this case is generally
directed to the primary disease. Strabismus may also result from a congenital
weakness of one or more extraocular muscles. In this case, the normal,
stronger member of a pair of muscles will tend to pull the eye in a
direction away from the weak muscle. The tendency of the eyes to deviate
in some cases is prevented by the brain's effort to fuse the images.
The eyes may also deviate in an upward, downward, or other direction,
depending on which pairs of extraocular muscles are mismatched in strength.
Treatment of congenital strabismus
generally consists of prescription eyeglasses, patching one eye, and
surgically tightening the weak muscles. This is usually done at an early
age because delays can risk permanent loss of binocular vision and three-dimensional
visual perception. Therefore, it is important that diagnosis and treatment
occurs by ages 7 to 8. Top
Keratoconus
The condition known as keratoconus
occurs when the curved, crystal clear cornea (the covering to our eye)
takes on a bulging or cone-like shape. When this bulging occurs the
cornea also gets thinner. These changes in the cornea seriously affect
the vision by causing astigmatism (irregular curvature of the cornea)
which results in very distorted vision. Although the cause is usually
unknown, there seems to be a genetic connection. Most of the time this
condition occurs bilaterally (or in both eyes), but one eye may be affected
before the other one. Onset usually occurs between 20 and 29 years of
age and will commonly worsen over a period of 15 to 20 years. Since
keratoconus involves a thinning of the cornea (and therefore probably
weakening it), any procedure that involves changes in the cornea will
further intensify the degeneration of a cornea that is already compromised.
If diagnosed by your ophthalmologist
early enough, the condition can often be treated with the use of contact
lens. If in an advanced state, keratoconus may need to be treated by
performing a cornea transplant to achieve better vision. This condition
would prohibit laser vision correction. Top
Ectropion
and Entropion
Ectropion is a turning of the
lid margin outward and away from the eye. Excessive drying of the cornea
and exposed eye results, causing irritation and tearing. The condition
is generally caused by abnormal muscle tone of the orbicularis oculi
muscle or by scarring. Treatment is surgical and directed to the specific
cause.
In entropion, the lid margins
are turned inward causing the eyelashes to rub against the eyeball producing
tearing, discomfort and possible scratching of the cornea. This condition
may be caused by excessive action of the orbicularis oculi muscle or
by scarring and is treated surgically. Top
Pinguecula
and Pterygium
A pinguecula is a small, benign,
yellow-white mass of degenerated tissue. This mass may be located on
either side of the cornea and may be present in both eyes. Pingeuculae
do not threaten vision but can cause minor eye irration.
A pterygium (ter ij' ee um) is
a wedge-shaped growth, probably the result of sun irritation. The abnormal
tissue gradually grows over the cornea and may cause irritation, chronic
redness, foreign-body sensation and sensitivity to light. The growth
can be surgically removed but may recur. Both pingueculae and pterygia
are caused by ultraviolet light damage. Top
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