What is Ptosis or Drooping Eyelid?
A Drooping of the Upper Eyelid
Ptosis is a drooping of the upper eyelid. The lid may droop only slightly, or it may cover the pupil or eye entirely. In some cases, ptosis can restrict and even block normal vision. It is usually treated with surgery. Ptosis can:
- Affect one or both eyelids
- Be inherited
- Be present at birth
- Occur later in life.
Ptosis is also known as 'drooping eyelid'. It is caused by weakness of the muscles responsible for raising the eyelid, damage to the nerves which control those muscles, or loose skin of the upper eyelids.
In the more serious cases of ptosis, the lids may droop or sag so much that they actually block a person's vision.
Ptosis or drooping eyelid can be caused by a congenital abnormality (present before birth), or an injury or disease. 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 called amblyopia (lazy eye) may develop. Amblyopia is poor vision in an eye that did not develop normal sight during early childhood. If left untreated, amblyopia can lead to poor vision permanently.
Although it is usually an isolated problem, a child born with ptosis may also have:
- Eye movement abnormalities
- Muscular diseases
- Eyelid tumors
- Neurological disorders
- Refractive errors.
Source : rch
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