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Ptosis is also called Dropping Eyelids.
Ptosis affects only the upper eyelid and can be present in one or
both eyes. The lid can droop a slight bit so that it's barely noticeable,
or the drooping lid can cover the whole pupil. Ptosis affects both
children and adults.
The lid may droop only slightly,
or it may cover the pupil entirely. In some cases, ptosis can restrict
and even block normal vision. It can be present in children, as
well as adults, and is usually treated with surgery. Ptosis can:
- Affect one or both eyelids;
- Be inherited;
- Be present at birth;
- Occur later in life.
|Ptosis which is present at
birth is called congenital ptosis. If a child is born with
moderate to severe ptosis, treatment is necessary to allow
for normal vision development. If it is not corrected, a condition
'lazy eye' may develop. If left untreated, amblyopia
can lead to permanently poor vision.
Ptosis in children
Ptosis which is present at birth is often caused
by poor development of the muscle which lifts the eyelid, called
the levator. Although it is usually an isolated problem, a child
born with ptosis may also have:
- Eye movement abnormalities
- Muscular diseases
- Lid tumors
- Neurological disorders
- Refractive errors.
Ptosis can be present at birth, called congenital
ptosis, or come about as a result of aging, injury or an after-effect
of cataract or other eye surgery. This condition can also be caused
by a problem with the muscles lifting the eyelid, called levators.
Sometimes an individual's facial anatomy causes difficulties with
the levator muscles.
An eye tumor, neurological disorder or systemic
disease like diabetes may result in drooping eyelids. Ptosis may
also be inherited.
In general, ptosis is divided into several types,
determined by the cause of the drooping eyelid. Myogenic ptosis
means that the lid sags because of a problem with the muscle that
raises the eyelid.
Neurogenic ptosis refers to the condition where
the nerve supply to the muscle is affected.
Mechanical ptosis occurs when the weight of the
eyelid is too great for the muscles to lift.
Involutional ptosis develops when the muscular connections
in the eyelid weaken. Myogenic ptosis is usually a reflection of
a systemic muscle disorder. When the muscles are weakened by disease,
they cannot pull the eyelid up into position. The muscles that raise
the eyelid are the levator muscle and Muller's muscle. An example
of a muscle condition that causes ptosis is MYASTHENIA GRAVIS.
This is a disease in which the voluntary muscles
in the body weaken due to abnormalities within the muscles, themselves.
People with myasthenia gravis will often have drooping eyelids as
well as crossed eyes due to imbalance of the muscles that control
eye movement. In congenital myogenic ptosis, the eyelid muscles
are either scarred or do not work. Abnormal nerve function causes
The most obvious sign of ptosis
is the drooping eyelid. Depending on how severely the lid droops,
people with ptosis may have difficulty seeing as a result. Sometimes
people with drooping eyelids tilt their heads back to try to see
under the lid, or raise their eyebrows repeatedly to try to lift
Surgery is usually the treatment of
choice for drooping eyelids. Surgery offers not only improved vision
but an enhanced cosmetic appearance. The levator muscles are tightened
during this procedure, or in very severe cases with weakened levator
muscles, the eyelid is attached under the eyebrow to allow the forehead
muscles to lift the eyelid, rather than the levator muscles. After
surgery, both eyelids may not appear symmetrical, though the lid
is higher than before surgery. Very rarely, eyelid movement may
Children born with moderate or severe
ptosis require treatment in order for proper vision to develop.
If the ptosis is not treated, amblyopia, a lack of central vision
development, and a lifetime of poor vision can result. Children
with ptosis, regardless of whether they have surgery, should have
a follow-up visit with their eyecare practitioner on a yearly basis.
The eyes change shape as they grow, and sometimes focusing and visual
problems develop with the eyes.
For more information of Ptosis and its treatment:
Source(s): All above information
& images are based on an article written by Gretchyn
Bailey allaboutvision.com and various other sources. All rights
reserved by respective owners.
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purposes, and may not be taken as an expert advice and should not
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