What Is Childhood Ptosis?

Childhood ptosis refers to drooping of the upper eyelid in infants or children. The most common form is congenital ptosis, which is present from birth. It results from abnormal development of the levator muscle, where normal muscle fibres are partially replaced by fibrous tissue. This limits the muscle's ability to lift the eyelid fully. Congenital ptosis is typically unilateral but can affect both eyes.

Why Is Childhood Ptosis Important?

The concern extends well beyond cosmetics. If a drooping eyelid covers or partially obstructs the pupil, it can interfere with the development of normal vision during the critical early years of life. This can lead to amblyopia (lazy eye), a condition in which the brain suppresses the image from the affected eye because it receives a consistently poor visual input. If amblyopia is not treated during childhood, the visual deficit can become permanent. Additionally, some children develop astigmatism from the mechanical pressure of the drooping lid on the cornea.

When Is Surgery Necessary?

Not all childhood ptosis requires immediate surgery. The timing depends on severity and its impact on visual development:

Urgent surgery: When the eyelid covers the visual axis and there is a clear risk of deprivation amblyopia. In these cases, surgery should not be delayed.
Early planned surgery: When the ptosis is moderate, causes a chin-up head posture, or is associated with developing astigmatism. Surgery is planned in the preschool years.
Observation: When the ptosis is mild, the visual axis is clear, and there is no evidence of amblyopia or astigmatism. These children are monitored regularly, and surgery can be deferred to an older age.

Clinical Evaluation

A thorough evaluation includes measurement of the palpebral fissure width, marginal reflex distance, and levator muscle function. The child's visual acuity, refractive error, and fundus are examined. The presence or risk of amblyopia is assessed. Bell phenomenon (the upward rotation of the eye on attempted lid closure) is also checked, as it plays an important role in surgical planning.

Surgical Options

When levator function is adequate (generally 5 mm or more), levator resection or advancement is performed. When levator function is very poor (generally below 4 mm), a frontalis sling procedure is preferred. In this technique, the eyelid is connected to the frontalis (forehead) muscle using a sling material, so that the forehead muscle assists in lifting the lid.

Postoperative Follow-Up

Regular ophthalmic follow-up after surgery is critically important in children. Lid position adequacy, corneal exposure, and ongoing visual development are all monitored. In some cases, ptosis may recur over time, or revision surgery may be needed. Amblyopia treatment (patching therapy) may be continued alongside or after surgery.

Conclusion

Childhood ptosis should not be ignored. Early diagnosis and appropriately timed surgical intervention can prevent amblyopia and support the child's visual development. Each case must be evaluated individually, and the treatment plan should be tailored to the child's specific needs.

Childhood Ptosis: When Does Surgery Become Necessary?