Optic nerve head drusen (ONHD)

Read our guide below about optic nerve head drusen.

You can also download a PDF version of this patient information by following the link on the right.

What are optic nerve head drusen (ONHD)?

They’re tiny calcium deposits buried in the visible part of the optic nerve of the eye.

ONHD are a common incidental finding. They’re seen in 0.3 to 0.5% of the general population and often in both eyes.

They form early in development but can be more difficult to see in children as they’re buried under the surface of the nerve. They become more prominent with age but don’t get worse.

It’s unknown why they form but they’re commonly inherited.

How are they diagnosed?

ONHD rarely cause symptoms and often discovered during a routine eye examination.

They can give the optic nerve a lumpy appearance or can make the nerve appear swollen.

Modern imaging techniques can confirm their diagnosis including ultrasound, red-free photography and optic coherence tomography (OCT).

Will they affect my vision ?

ONHD don’t usually affect how well we see. The calcium deposits can occasionally press on the nerves and cause small blind spots in the vision
It’s unlikely you’ll notice them with both eyes open.

They’ve been associated with a rare complication of pressing on the blood vessels in and around the optic nerve which may effect sight.

Can you treat or remove ONHD?

No. There’s currently no treatment for ONHD.

If you have ONHD, see your optometrist for regular eye exams or, if you notice any change in your vision.

How can I help reduce healthcare associated infections?

Infection prevention and control is important to the wellbeing of our patients so we have procedures in place. Keeping your hands clean is an effective way of preventing the spread of infections.

You, and anyone visiting you, must use the hand sanitiser available at the entrance to every ward before coming in and after you leave. You may need to wash your hands at the sink using soap and water. Hand sanitisers are not suitable for dealing with patients who have symptoms of diarrhoea.

More help or advice

Contact our patient advice and liaison service (PALS) on 01296 831120 or  bht.pals@nhs.net