Melanoma involving the optic nerve: what to know

The optic nerve carries visual information from the eye to the brain. A tumour in or near this pathway can affect sight, eye movement, or the appearance of the pupil. The term melanoma may refer to a primary eye or nearby tumour, or to melanoma that has spread from another site; specialists establish which situation applies.

Assessment may include visual acuity, colour vision, pupil reactions, eye examination, neurological examination and imaging. A biopsy is not suitable for every location, so the team chooses tests according to safety and diagnostic value. Melanoma and Brain Metastases provide general background, but they do not replace an eye or oncology consultation.

Arrange prompt review with an ophthalmologist or neuro-ophthalmology team for unexplained vision loss, a new blind area, double vision, or a change in eye position. Bring previous scans, eye-test results, medication details, and information about any earlier melanoma diagnosis.

Treatment depends on the tumour’s site, size, spread and effect on vision. Options may involve local surgery or other tumour removal surgery, radiation-based care, or systemic treatment such as immunotherapy. Ask whether lymph-node assessment or further staging is needed before a plan is chosen.

Seek emergency care for sudden loss of vision, a new curtain or shadow across vision, severe eye pain with vomiting, sudden double vision, new facial weakness, confusion, or a severe headache. Do not drive yourself if sight or alertness is affected. Rapid assessment can distinguish an eye emergency from a tumour-related problem.

Ask exactly where the melanoma is, whether the optic nerve is involved directly or compressed, and which tests support that conclusion. Ask how vision may be affected, whether a biopsy is safe, what treatment aims to protect, and how follow-up scans will be scheduled. Ask which new visual or neurological symptoms require immediate contact.