Surgery for paediatric cataracts

Paediatric cataracts occur when the normally clear lens of a child’s eye becomes cloudy, affecting the passage of light and impairing vision. Although cataracts are more commonly associated with ageing, they can also affect infants and children. Early diagnosis and timely surgical treatment are essential to support normal visual development and prevent long-term visual impairment.

What causes cataracts in children?

Paediatric cataracts may be present at birth (congenital) or develop during childhood. Causes vary and may include genetic factors, infections during pregnancy, metabolic conditions, trauma, or other eye abnormalities. In some cases, no specific cause is identified.

Cataracts may affect one eye (unilateral) or both eyes (bilateral). The impact on vision depends on the size, density and location of the cataract.

How do cataracts affect visual development?

Vision develops rapidly during infancy and early childhood. Clear visual input is essential for the brain to learn how to process images properly. If a cataract blocks light from reaching the retina, the brain may not develop normal visual pathways.

This can lead to amblyopia, also known as ‘lazy eye’, which may cause permanent visual reduction if it isn’t treated early. For this reason, prompt assessment by a paediatric ophthalmologist is critical.

Signs that may suggest a cataract in a child include:

a white or cloudy appearance in the pupil
poor visual tracking or lack of eye contact
involuntary eye movements
squint (strabismus)
sensitivity to light

Early detection allows treatment to be planned at the most appropriate time.

When is surgery needed?

Surgery is recommended when the cataract significantly interferes with vision or threatens visual development. The timing depends on the child’s age, whether one or both eyes are affected, and the severity of the cataract.

In infants with dense cataracts, surgery may be performed within the first few months of life. Early intervention is important to allow normal visual development and reduce the risk of amblyopia.

Less severe cataracts may be monitored initially, with surgery performed if vision becomes affected.

What does paediatric cataract surgery involve?

The procedure involves removing the cloudy lens from the eye. In many cases, an artificial intraocular lens is inserted to restore focusing ability. In younger infants, contact lenses or glasses may be used instead, depending on individual circumstances.

Paediatric cataract surgery is performed under general anaesthesia to ensure the child remains still and comfortable. The operation is highly specialised and typically takes less than an hour.

Advances in surgical techniques have made the procedure safer and more effective, with excellent visual outcomes in many cases.

Recovery and follow-up care

Follow-up care is essential after surgery. Children may need glasses or contact lenses to achieve the best vision. Eye drops are used to reduce inflammation and prevent infection.

Regular monitoring allows early detection of complications and ensures visual development progresses normally. Treatment for amblyopia, such as patching the stronger eye, may also be required.

Long-term outlook

With early diagnosis and appropriate surgical treatment, many children achieve good visual outcomes. Ongoing follow-up throughout childhood ensures vision continues to develop properly.

Paediatric cataract surgery plays a crucial role in protecting visual development, allowing children to achieve their full visual potential and supporting normal learning and development.