Congenital Glaucoma

Overview

Congenital glaucoma is a rare eye condition that is present at birth or develops in the first year of life. It happens when the eye's drainage system does not form properly, so fluid cannot drain well. This raises the pressure inside the eye. Over time, high pressure can damage the optic nerve, the nerve that carries pictures from the eye to the brain. The clear front window of the eye, called the cornea, can also become cloudy. Finding it early and getting eye care quickly gives the best chance of protecting sight.

Congenital glaucoma is rare. It affects only a small number of babies each year.

It can affect babies at birth or in the first year of life. It can affect one eye or both eyes, and it affects both boys and girls. Some cases are linked to family history or to other health conditions, but often no clear cause is found.

Symptoms

Common symptoms

• An eye or eyes that look larger than expected
• A cloudy or hazy cornea, the clear front window of the eye
• Lots of tearing, even when the baby is not crying
• Being very sensitive to light or keeping the eyes closed in bright light
• Squinting, rubbing the eyes, or seeming uncomfortable in light
• Not following objects well or seeming to have poor vision

Symptoms in children

• One eye may look bigger than the other
• The eye may look cloudy or have a bluish haze
• The child may avoid bright light or cover the eyes
• The child may rub the eyes often
• A child old enough to talk may say vision is blurry or that lights hurt
• An eye may turn in or out, or the child may hold things very close to see

Causes

Main causes

• Congenital glaucoma happens when the drainage angle inside the eye does not form properly before birth.
• Because fluid cannot drain well, pressure can build up inside the eye.
• In many cases, the exact reason this happens is not known.
• Some cases are linked to gene changes or to other health conditions that affect how the eye develops.

Risk factors

• A family history of congenital glaucoma or childhood glaucoma
• Certain genetic conditions or syndromes that affect the eyes
• Being born with eye changes that a doctor notices at birth
• Having a parent or sibling with childhood glaucoma

When to see a doctor

See a doctor urgently if:

• Your baby has a cloudy cornea, an eye that looks larger than expected, or lots of tearing and light sensitivity.
• You notice one eye getting bigger than the other.
• Your child has eye pain, keeps the eye closed, or rubs it often.
• Your child's vision changes or an eye turns in or out suddenly.

Book a routine appointment if:

• Your baby's newborn and childhood eye checks.
• A family history of congenital glaucoma or childhood glaucoma.
• Regular follow-up if your child has had eye pressure problems or eye surgery.
• Any concern about your child's vision, even if the eye looks normal.

Diagnosis

An eye doctor, called an ophthalmologist, diagnoses congenital glaucoma by examining the eyes and checking the pressure inside them. Because babies and young children may not sit still for a full eye exam, the doctor may need to do the exam under anesthesia, which means your child sleeps during the test. This is safe and common for young children. The doctor will look at the cornea, the optic nerve, and the drainage angle of the eye.

Tests that may be done

• Eye pressure check, called tonometry
• Measurement of the cornea's size and clarity
• Examination of the optic nerve at the back of the eye
• Examination of the drainage angle inside the eye
• Ultrasound or other imaging of the eye
• Vision and glasses checks when the child is old enough
• Visual field tests when the child is old enough to cooperate
• Genetic counseling or testing if a family history or other health conditions are present

What to expect at your appointment

You may need more than one visit. Some tests are done in the eye clinic, and some may be done under anesthesia for a baby or young child. The eye doctor will explain what they find and what steps come next. It can feel like a lot to take in, so it is okay to ask questions and bring someone with you for support.

Treatment

The goal of treatment is to lower the pressure inside the eye and protect the optic nerve. Treatment is planned by an eye doctor. For congenital glaucoma, surgery is often the main treatment, and it is usually done early. Medicines may be used to help lower pressure while waiting for surgery or after surgery. Your child will need regular eye checks to make sure the pressure stays safe and vision is developing well.

Self-care at home

• Keep all eye clinic appointments, even if your child's eyes look normal.
• Use any eye medicines exactly as the eye doctor prescribes. Ask the pharmacist or eye clinic team to show you how to give them.
• Watch for new signs such as cloudy eyes, tearing, light sensitivity, eye rubbing, or a change in vision.
• Protect your child's eyes during play. Ask the eye doctor if your child needs sports goggles or other eye protection.
• Ask your child's school or nursery for support with vision needs.
• Ask about low vision services, vision therapy, or glasses if your child needs them.

Medical treatments

Eye doctors may use pressure-lowering eye drops or other medicines to help control the pressure inside the eye. These are chosen by the eye doctor based on your child's age, eye pressure, and eye structure. Medicines do not usually cure congenital glaucoma, but they can help protect the eye while other treatment is planned or after surgery. No medicine should be started or changed without the eye doctor's advice.

When is surgery considered?

Surgery is usually needed for congenital glaucoma and is often the main treatment. The type of surgery depends on the child's age and the structure of the eye. Surgery may open the drainage angle, create a new way for fluid to drain, or place a small tube to help fluid leave the eye. Some children need more than one surgery. Your eye doctor will explain the benefits, risks, and what to expect.

Living with this condition

Life with congenital glaucoma involves regular eye checks and watching for changes. Many children can play, learn, and take part in normal activities. Your eye clinic team will help you learn what to watch for and how to support your child's vision at home and at school.

Lifestyle tips

• Keep a simple record of appointments, eye medicines, and any changes you notice.
• Encourage safe play. Ask the eye doctor about contact sports or activities that could injure the eye.
• Use glasses or eye protection if the eye doctor recommends them.
• Tell teachers, carers, and nursery staff about your child's eye condition and any vision needs.
• Ask about support for learning, reading, or low vision if your child needs it.

Diet and exercise

There is no special diet for congenital glaucoma. A healthy, balanced diet and normal play and exercise are good for overall health. Ask the eye doctor if your child needs to avoid any activities, especially after surgery. Regular movement and play help children grow and feel well.

Mental health and emotional wellbeing

A diagnosis of congenital glaucoma can feel overwhelming for parents and carers. Some parents feel guilt or worry, even though the condition is not caused by anything they did. Children may feel different from others or worry about eye appointments. It is okay to ask for emotional support. Talking to your eye clinic team, a counselor, or trusted family and friends can help.

Prevention

Congenital glaucoma cannot usually be prevented because it develops before birth. The best way to protect vision is to find it early. Newborn and childhood eye checks help. If there is a family history of congenital glaucoma or childhood glaucoma, tell your doctor so your child can be checked as advised.

Vaccines

Routine childhood vaccines do not cause or prevent congenital glaucoma. Keep your child's vaccinations up to date as advised by your health team.

Screening programmes

Newborn and child health checks often include a basic eye check. If there is a family history of congenital glaucoma, or if a doctor notices eye signs, your child may need a full eye exam. Genetic counseling may be helpful for families with a known inherited condition.

Complications

If left untreated

• Damage to the optic nerve, which can cause permanent vision loss
• Clouding or scarring of the cornea
• An eye that becomes enlarged and may not see well
• Lazy eye, called amblyopia, if one eye sees poorly
• Severe vision loss or blindness in rare cases
• The need for more complex eye surgery later

Long-term outlook

The outlook can be good, especially when congenital glaucoma is found early and treated promptly. Many children keep useful vision with surgery, regular eye checks, and support for vision needs. Some children need lifelong eye care, glasses, or low vision help. Regular follow-up gives the best chance to catch problems early and protect sight.

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