Eyelid & Conjunctival Cancer, from the CureRays guide library.

Eyelid and conjunctival cancers are skin and surface cancers of the eye area; most are highly curable, and radiation helps treat the eye while preserving sight.

What it is.

Eyelid and conjunctival cancers are cancers that form on the eyelids or on the thin, clear membrane (the conjunctiva) that covers the white of the eye and lines the inside of the eyelids. Eyelid cancers are a kind of skin cancer in a very delicate location, most often caused by years of sun exposure. The most common type is basal cell carcinoma, which grows slowly and rarely spreads, followed by squamous cell carcinoma and, less often, a more serious type called sebaceous carcinoma. On the conjunctiva, cancers include surface squamous lesions (often linked to sun and sometimes HPV) and conjunctival melanoma. Warning signs include a new or changing bump, a sore that doesn't heal, loss of eyelashes, persistent redness or irritation, or a colored spot on the surface of the eye. Because this area is so important for protecting vision and for appearance, treatment is carefully planned by eye and cancer specialists. Most of these cancers are highly curable, and the goal is to remove or destroy the cancer while preserving the eye, eyelid function, and sight.

How radiation treats it.

Radiation uses focused high-energy beams — x-rays, electrons, or a small radioactive plaque placed close to the tumor — to damage the DNA inside cancer cells so they can no longer grow and divide. The eye area is delicate and precious, so radiation here is planned with great care, often using a protective shield over the eye and beams shaped to spare the lens, the surface of the eye, and the tear glands. For eyelid and conjunctival cancers, radiation is valuable in two ways: it can cure many cancers without surgery — important when an operation would damage vision or the eyelid's ability to protect the eye — and it can treat any cancer left behind after surgery, especially for more serious types. For conjunctival melanoma and certain tumors, a tiny radioactive plaque delivers a strong, focused dose right at the tumor. Treatments are painless and given over short sessions. Side effects, such as temporary redness, dryness, or irritation, are usually mild and managed by the eye care team.

The ways we can treat it.

External beam radiation. Precise external radiation treats eyelid cancers while protecting the eye itself, often with a small shield placed over the eye during treatment.

Plaque brachytherapy. A tiny radioactive plaque is temporarily stitched near the tumor to deliver a high, focused dose over a short distance, protecting the rest of the eye.

Electron therapy. Electron beams treat shallow eyelid skin cancers, delivering dose to the surface while sparing deeper structures behind it.

Post-surgery radiation. Radiation after surgery treats any remaining microscopic cancer, especially for higher-risk types like sebaceous carcinoma or when nerves are involved.

Questions we hear often.

Will I lose my eye? Almost never for early eyelid and conjunctival cancers. These are usually caught small and treated with surgery, radiation, or eye drops while preserving the eye and vision. Removing the eye is reserved for rare, very advanced cases. Your team's goal is always to keep your eye and sight.

Can radiation treat eye cancer without surgery? Yes. Focused radiation can cure many eyelid and conjunctival cancers, and it's especially useful when surgery would harm vision or the eyelid's function. A protective shield is used to safeguard the eye during treatment.

How do I lower my risk? Most eyelid and surface eye cancers are linked to sun exposure, so protecting your eyes and the skin around them with UV-blocking sunglasses and a hat helps. Report any new bump, non-healing sore, lost eyelashes, or colored spot on the eye to your doctor early.

This guide is informational only. It is not medical advice — please confirm anything here with your care team.