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Ptosis

What is Ptosis?

Ptosis is a drooping of the upper eyelid. 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 called amblyopia may develop. If left untreated, amblyopia can lead to permanently poor vision.

Ptosis in children

Congenital ptosis 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

Congenital ptosis usually does not improve with time.

What are the signs and symptoms?

The most obvious sign of ptosis in children is the drooping lid itself. Children with ptosis often tip their heads back into a chin-up position to see underneath their eyelids, or they may raise their eyebrows in an attempt to lift up the lids. Over many years, abnormal head positions may cause deformities in the head and neck.

What problems can result from ptosis in children?

The most serious problem associated with childhood ptosis is amblyopia (“lazy” eye). Amblyopia is poor vision in an eye that did not develop normal sight during early childhood. This can occur if the lid is drooping severely enough to block the child’s vision. More frequently, it can occur because ptosis tends to change the optics of the eye, causing astigmatism. Finally, ptosis can hide misaligned or crossed eye, which can also cause amblyopia.

If amblyopia is not treated early in childhood, it persists throughout life.

How is congenital ptosis treated?

In most cases, the treatment for childhood ptosis is surgery, although there are few rare disorders which can be corrected with medications. In determining whether or not surgery is necessary and what procedure is the most appropriate, an ophthalmologist must consider a few important factors:

• The child’s age
• Whether one or both eyelids are involved
• Measurement of the eyelid height
• The eyelid’s lifting and closing muscle strength
• Observation of the eye’s movements

During surgery the levators, or eyelid lifting muscles, are tightened. In severe ptosis, when the levator is extremely weak, the lid can be attached or suspended from under the eyebrow so that the forehead muscles can do the lifting. Lubricant drops and ointment can be helpful during this period.

Although improvement of the lid height is usually achieved, the eyelids may not appear perfectly symmetrical. In rare cases, full eyelid movement does not return. In some cases, more than one operation may be required.

Summary

Ptosis in both children and adults can be treated with surgery to improve vision as well as cosmetic appearance. It is very important that children with ptosis have regular ophthalmic examinations early in life to protect them from the serious consequences of untreated amblyopia.