Neuro-ophthalmology

Neuro-ophthalmology: when the problem lies behind the eye

Some vision problems start not in the eye itself but in the optic nerve or the pathways that carry vision to the brain. They can cause sudden vision loss, double vision or loss of side vision. Many need prompt care, and some need us to work with a neurologist or physician.

Written by Dr. B. Anil Kumar · Reviewed by Dr. Praveen Kumar · Last reviewed 25 September 2026
Ophthalmic specialist wearing surgical loupes conducting detailed clinical assessment

Conditions we see

Optic neuritis

Inflammation of the optic nerve. Vision usually blurs over a few days, colours look faded, and moving the eye may hurt. Many people recover much of their vision; your doctor will explain whether treatment and further tests, such as an MRI scan, are needed.

Swelling of the optic nerve (papilloedema)

Swelling where the optic nerve enters the eye can be a sign of raised pressure inside the head. It needs prompt investigation, usually with a brain scan, so the cause can be treated before sight is harmed.

Loss of blood supply to the optic nerve (ischaemic optic neuropathy)

A sudden, usually painless loss of vision in one eye caused by reduced blood flow to the optic nerve. High blood pressure, diabetes and sleep apnoea increase the risk. In older people it can be caused by inflammation of the arteries (giant cell arteritis), which needs urgent treatment to protect the other eye.

Double vision in adults (diplopia)

When one of the nerves that move the eyes stops working properly, the eyes stop pointing together and you see double. Common causes include diabetes, high blood pressure, injury, and, less often, problems inside the head. Treatment depends on the cause; prisms in glasses can ease double vision while it recovers, and surgery is sometimes considered later.

Toxic and nutritional optic nerve damage

Heavy tobacco and alcohol use, and a lack of B vitamins and folic acid, can damage the optic nerve, causing a slow, painless blurring of central vision in both eyes. Finding it early matters.

Tests you may need

  • Vision, colour vision and pupil checks.
  • A visual-field test to map your side vision.
  • A scan of the optic nerve (OCT).
  • Blood tests and blood-pressure checks.
  • A brain CT or MRI scan, arranged through the hospital or your doctor.

When to get help urgently

Come the same day if you have sudden loss or dimming of vision in one or both eyes (even if it comes back), new double vision (especially with headache or a drooping eyelid), sudden loss of part of your field of vision, or pain behind the eye with blurred or dull colours.

Who treats neuro-ophthalmology here

Dr. B. Anil Kumar

Founder & Senior Eye Surgeon

Diagnostic equipment & technology: Zeiss Humphrey Visual Field Analyser (HFA 3), Spectral Domain Optical Coherence Tomography (OCT)

Questions patients ask

Does double vision always need an urgent check?

Yes. Sudden onset of double vision in adults can be due to diabetes or high blood pressure, but urgent examination is needed to rule out nerve palsy or neurological causes.

Can optic neuritis vision loss recover?

Yes. Many people recover substantial vision following optic neuritis, especially after prompt medical assessment and treatment.

References

[R25] American Academy of Ophthalmology, Optic Neuritis and Ischemic Optic Neuropathy Guidelines; North American Neuro-Ophthalmology Society (NANOS) (https://www.aao.org/eye-health/diseases/optic-neuritis).