What is Paediatric Cataract?
A paediatric cataract is a clouding of the natural crystalline lens of the eye in a child — present at birth (congenital cataract), developing in early childhood (infantile cataract), or appearing during the school years (juvenile cataract). Unlike adult cataract, which develops gradually and affects an eye with a fully formed visual system, a cataract in a child threatens the development of vision itself. The visual system undergoes rapid maturation during the first decade of life and requires clear, focused images from both eyes to develop normally. A significant cataract — particularly one present from birth — deprives the developing visual cortex of the stimulation it needs, leading to amblyopia (lazy eye), a permanent reduction in visual acuity that persists even after the cataract is removed if it is not managed promptly and comprehensively.
Paediatric cataracts may be unilateral (one eye) or bilateral (both eyes). Bilateral cataracts are more commonly associated with metabolic conditions (galactosaemia, hypoglycaemia), chromosomal disorders (Down syndrome), intrauterine infections (rubella, toxoplasmosis), or inherited genetic mutations. Unilateral cataracts are frequently sporadic (no identifiable cause) but can also be associated with ocular abnormalities such as persistent fetal vasculature.
Vasan Eye Care provides a dedicated paediatric cataract service, including surgical removal, intraocular lens implantation where appropriate, and the intensive optical rehabilitation and amblyopia management that determines the final visual outcome in these children.
Paediatric Cataract in India – Understanding the Condition and Treatment
Childhood cataract is a significant cause of preventable blindness in India. An estimated 25,000–50,000 children are blind from cataract in India at any given time, and childhood cataract accounts for approximately 10–12% of all childhood blindness in the country. Barriers to timely management include lack of awareness among parents, limited access to specialist paediatric ophthalmic care in rural areas, and the cost of surgery and post-operative optical rehabilitation.
India’s National Programme for Control of Blindness has identified childhood cataract as a priority condition, and several non-governmental organisations and academic centres — including those associated with Vasan Eye Care — run outreach programmes to identify and treat children with cataract in underserved populations. Early identification, prompt surgical intervention, and diligent post-operative care remain the pillars of management.
Types and Causes of Paediatric Cataract
| Type | Timing | Common Causes |
|---|---|---|
| Congenital cataract | Present at birth | Genetic; intrauterine infection (rubella, CMV); metabolic disorders; idiopathic |
| Infantile cataract | First year of life | Metabolic (galactosaemia); genetic; persistent fetal vasculature |
| Developmental / juvenile cataract | Age 1 to 10 years | Hereditary; trauma; systemic disease (diabetes, Wilson’s disease) |
| Traumatic cataract | Any age | Blunt or penetrating eye injury; surgery-related |
| Secondary cataract | Any age | Uveitis; radiation; systemic steroid use |
Paediatric Cataract: How the Surgery Works
Paediatric cataract surgery is performed under general anaesthesia, as children cannot cooperate with the conscious-sedation approaches used in adults. The surgical technique is similar to adult phacoemulsification in principle but differs in important ways. The lens material in children is softer and can usually be aspirated without phacoemulsification ultrasound energy. The lens capsule in children is more elastic and the vitreous more formed — making the risk of vitreous prolapse during surgery higher, and often necessitating a posterior capsulotomy (opening the back capsule) and anterior vitrectomy at the time of surgery to prevent posterior capsule opacification (PCO), which occurs virtually universally in young children if the capsule is left intact.
The decision to implant an intraocular lens (IOL) at the time of surgery depends on the child’s age. In infants under six months, the IOL power calculation is imprecise because the eye continues to grow significantly, changing the refractive requirements. Many surgeons leave infants aphakic (without a lens) after cataract removal and provide optical correction with a contact lens until the child is old enough for reliable biometry. In older children (over 2 years in most centres), primary IOL implantation is standard practice, with a “hypermetropic shift” target to account for continued eye growth.
When Is Surgery for Paediatric Cataract Necessary?
- Any dense cataract in an infant or young child that obstructs the visual axis — surgery should be performed urgently (within weeks of diagnosis) to prevent irreversible amblyopia
- A unilateral cataract dense enough to cause significant visual deprivation — even a partial opacity can cause profound amblyopia in the affected eye
- Bilateral cataracts that are visually significant — surgery should be staged but performed within weeks
- Lens-induced complications — cataract causing secondary glaucoma or uveitis
Not all paediatric cataracts require immediate surgery. Small, peripheral, or lamellar cataracts that do not significantly obstruct vision may be managed with close observation and refractive correction, provided visual development is progressing normally.
Paediatric Cataract Surgery – Step-by-Step
- Diagnosis: Red reflex examination; slit-lamp biomicroscopy under general anaesthesia if needed; anterior segment OCT; B-scan ultrasound if fundus view is obscured.
- Pre-operative planning: Biometry for IOL power calculation (with age-appropriate hypermetropic target); systemic evaluation for associated conditions (metabolic screen; chromosome analysis; TORCH serology).
- General anaesthesia: Administered by a paediatric anaesthetist experienced in infant and child anaesthesia.
- Lens aspiration: Anterior capsulotomy (capsulorrhexis); lens aspiration using irrigation-aspiration probe (phacoemulsification ultrasound generally not needed).
- Posterior capsulotomy and anterior vitrectomy: In children under 6–8 years, the posterior capsule is opened and a limited vitrectomy is performed to prevent post-operative posterior capsule opacification.
- IOL implantation (where indicated): Foldable acrylic IOL implanted into the capsular bag; in infants, the eye is left aphakic for later secondary IOL implantation.
- Optical rehabilitation: Contact lens fitting (for aphakic infants); spectacles for older children; commenced as soon as possible after surgery.
- Amblyopia treatment: Patching of the fellow (unaffected) eye commenced promptly and maintained under close supervision.
How Much Does Paediatric Cataract Surgery Cost in India?
| Service | Approximate Cost Range (INR) |
|---|---|
| Paediatric cataract surgery (aspiration + posterior capsulotomy) | ₹30,000 – ₹70,000 |
| Paediatric cataract surgery + IOL implantation | ₹45,000 – ₹1,00,000 |
| Secondary IOL implantation (aphakic child) | ₹40,000 – ₹90,000 |
| Contact lens fitting for aphakic infant | ₹3,000 – ₹10,000 per lens (ongoing) |
| General anaesthesia (per surgical session) | ₹8,000 – ₹20,000 |
Financial assistance may be available through government schemes and NGO support for qualifying families. Contact Vasan Eye Care for information.
Paediatric Cataract Post-Surgery Care and Recovery
What to Expect After Paediatric Cataract Surgery?
The eye will be red and swollen for the first few days after surgery. Eye drops are prescribed to prevent infection and inflammation, and must be administered consistently — this requires parental cooperation and perseverance. The critical phase of management, however, begins after the surgery: optical rehabilitation and amblyopia treatment. These must be initiated as quickly as possible after surgery and maintained diligently throughout the visual development period, which extends to approximately age 9–10 years.
Parents should be counselled that surgery is the beginning, not the end, of treatment. A child’s final visual outcome depends far more on the quality and consistency of post-operative optical rehabilitation and amblyopia treatment than on the surgery itself.
Post-Operative Care Tips
- Administer all prescribed eye drops on schedule — antibiotic and steroid drops are typically required for 4–6 weeks
- Fit the contact lens or spectacles as soon as possible after surgery — every day without optical correction is a day of lost visual stimulation
- Maintain the patching schedule strictly — amblyopia treatment requires consistency over months to years
- Attend all follow-up appointments — visual acuity is monitored regularly to guide patching intensity
- Prevent the child from rubbing the operated eye — a protective shield or mittens may be needed in very young infants
- Be alert to signs of secondary glaucoma (photophobia, watering, enlarged-looking eye) — a rare but important complication after childhood cataract surgery
References
- American Academy of Ophthalmology. Paediatric Cataract. https://www.aao.org/eye-health/diseases/congenital-cataracts
- PMC – NCBI. Childhood Cataract: Aetiology and Management. 2021. https://pmc.ncbi.nlm.nih.gov/articles/PMC8276038/
- National Eye Institute. Cataracts in Children. https://www.nei.nih.gov/learn-about-eye-health/eye-conditions-and-diseases/cataracts
Frequently Asked Questions
For a dense cataract in a young infant, surgery should be performed within days to weeks of diagnosis — ideally by 6–8 weeks of age for a unilateral cataract, and within 6–10 weeks for bilateral cataracts. The earlier the visual deprivation is corrected, the better the visual outcome. Even a few weeks of delay in infancy can significantly affect the final visual acuity.
After cataract removal in a very young infant, the eye is left without a lens (aphakic) because the eye will grow significantly over the next 2–3 years, changing the refractive power needed. An IOL implanted at birth would have the wrong power as the child grows. A contact lens provides immediate optical correction that can be changed as the prescription evolves. Once the eye has grown sufficiently (typically after age 2), a secondary IOL can be implanted.
Yes. Even with an IOL, children will need glasses — the IOL corrects only for distance (or near), and glasses are needed for the other focal distance, and for reading. Additionally, the operated eye is deliberately left slightly hypermetropic (far-sighted) to account for eye growth, so glasses are needed from the outset.
Amblyopia (lazy eye) develops when one eye receives a clearer image than the other during the visual development period, causing the brain to suppress the weaker eye’s input. After cataract surgery, amblyopia in the operated eye is treated by patching the fellow (better) eye for a prescribed number of hours per day, forcing the operated eye to work and develop. This requires persistence over months to years.
Approximately one-third of congenital cataracts have a genetic cause, most commonly autosomal dominant inheritance (one parent is also affected). A thorough family history and genetic counselling are recommended for families with an affected child.
A systemic evaluation is important in bilateral cataracts to identify treatable underlying causes — blood glucose (galactosaemia), TORCH serology (rubella, CMV, toxoplasmosis), urine amino acids, and chromosomal analysis if dysmorphic features are present. Unilateral cataracts are less often associated with systemic disease but should still have a paediatric assessment.
Posterior capsule opacification (PCO) is the regrowth of lens epithelial cells across the back capsule after cataract surgery — creating a new “secondary cataract”. In adults, this is treated with a simple laser procedure (YAG capsulotomy) in the clinic. Children cannot cooperate with this, and moreover, PCO occurs with near-certainty in young children within weeks of surgery. For this reason, the posterior capsule is routinely opened (posterior capsulotomy) and an anterior vitrectomy performed at the time of paediatric cataract surgery.
Yes. Aphakic or pseudophakic glaucoma is a well-recognised long-term complication of paediatric cataract surgery, occurring in approximately 10–20% of cases over the years. This requires lifelong intraocular pressure monitoring at every follow-up visit, even after the amblyopia treatment phase is complete.
Outcomes are highly variable and depend on the type of cataract, timing of surgery, consistency of optical rehabilitation, and duration of amblyopia treatment. Bilateral cataracts treated early generally have better visual outcomes than unilateral cataracts, as the amblyopia component is less severe. With optimal management, many children with bilateral cataracts achieve functional vision; a proportion will have some residual visual impairment.
Yes. Vasan Eye Care provides comprehensive paediatric cataract services — surgical removal, IOL implantation where appropriate, contact lens fitting for aphakic infants, amblyopia treatment, and long-term monitoring for complications such as glaucoma.
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