An eye nevus is a flat or slightly raised pigmented spot on the iris, choroid, or conjunctiva. It is similar to a freckle or mole on the skin and is usually benign.
Appearance and monitoring
Most nevi remain stable for life. However, a small number can change, so regular observation is important.
- Colours range from light brown to dark brown or grey.
- Location can be on the coloured part, white surface, or beneath the retina.
- Photographs and scans help track any growth or alteration.
- Most do not affect vision or cause symptoms.
- Risk factors for change include thickness and orange pigment in some sites.
When to be concerned
Changes in size, shape, or associated symptoms need prompt review. Early detection of rare malignant transformation improves outcomes.
- Report new visual distortion, flashes, or shadows.
- Regular specialist reviews are advised for larger or atypical nevi.
- Treatment, when required, may range from monitoring to radiotherapy or surgery.
- Sun protection and avoiding tanning beds are sensible general measures.
- Do not ignore a long-standing spot that suddenly looks different.
