What is hydrocephalus?

“Hydrocephalus is a condition where excess cerebrospinal fluid (CSF) builds up inside the brain’s ventricles. In infants, this can increase pressure in the skull as their bones are still soft and expanding,” says Dr Saxena.

If left untreated, that pressure can interfere with brain development and lead to serious complications.

“This pressure may lead to an enlarged head, affect brain development, and, if untreated, lead to developmental delays, vision problems, seizures, or long-term neurological conditions. Early detection is important to prevent permanent damage,” says Dr Saxena.

Why do the eyes look fixed downward?

Parents should also lookout for excessive sleepiness, irritability and anormal eye momemts (Image: Pexels)

Parents should also look out for excessive sleepiness, irritability and abnormal eye movements (Image: Pexels)

The downward gaze happens because rising pressure inside the skull begins affecting areas of the brain that control eye movement.

“The pressure may push the eyes downward, making it difficult for the child to look upward,” says Dr Saxena.

This visible sign often indicates significant internal pressure.

“This sign often indicates significant pressure and should never be ignored, especially if accompanied by irritability or head enlargement,” says Dr Saxena.

Other symptoms parents may miss

Hydrocephalus does not always present dramatically in the early stages, which is why some signs may be overlooked.

“Apart from head enlargement, symptoms of hydrocephalus may include poor feeding, frequent vomiting, excessive sleepiness, irritability, delayed milestones, weak muscle tone, seizures, and abnormal eye movements,” says Dr Saxena.

In older children, the warning signs may look different. “Symptoms can include headaches, blurred vision, difficulty concentrating, and balance problems,” says Dr Saxena.

Because some symptoms develop gradually, parents may dismiss them as temporary discomfort or routine developmental issues.

How urgent is it?

mmediate medical evaluation is necessary as rising pressure can significantly affect brain function (Image: Pexels)

Doctors say this is not something to monitor casually at home.

“Downward-fixed eyes in a baby can indicate increased intracranial pressure from hydrocephalus and should be treated as urgent,” says Dr Saxena. “Immediate medical evaluation is necessary as rising pressure can significantly affect brain function.”

What causes it—and can it be treated?

Hydrocephalus in infants may develop due to congenital conditions, brain malformations, infections during pregnancy, bleeding in the brain (especially in premature babies), or tumours blocking the normal flow of fluid.

The good news is that timely treatment can improve outcomes significantly. “It usually involves surgery to redirect excess fluid and relieve pressure,” says Dr Saxena.

The most common treatment involves placing a shunt system to drain excess fluid into another part of the body, or performing an endoscopic procedure to improve fluid flow.

“When managed promptly, children can have good developmental outcomes,” says Dr Saxena.

So if your baby’s eye movements seem unusual—especially if accompanied by vomiting, irritability, unusual sleepiness, or a rapidly enlarging head—seek medical attention promptly.

DISCLAIMER: This article is based on information from the public domain and/or the experts we spoke to. Always consult your health practitioner before starting any routine.