Eye is the organ that collects light and sends messages to the brain to form a picture. The three main parts of the eye:
2) Orbit (eye socket)
3) Adnexal (accessory) structures (such as the eyelid and tear glands)
- The outer part of the eye is made up of the retina, sclera and uvea.
- The sclera is the outer wall of the eyeball.The retina is a thin-layered structure that lines the eyeball and sends information from the eye to the brain.
- The uvea nourishes the eye. Both the retina and the uvea contain blood vessels.
- The uvea consists of the following:
Iris: The colored part of the eye that controls the amount of light entering the eye.
Ciliary body: Muscular tissue that produces the watery fluid in the eye and helps the eye focus.
Choroid: The layer of tissue underneath the retina that contains connective tissue and melanocytes and nourishes the inside of the eye; the choroid is the most common site for a tumor.
Symptoms of eye cancer:
- Bulging of one eye
- Complete or partial loss of sight
- Pain in or around the eye (rare with eye cancer)
- Blurred vision
- Change in the appearance of the eye
Eye cancer can also cause
- Seeing spots or flashes of light or wiggly lines in front of your eyes
- Blinkered vision (loss of peripheral vision) – you can see what is straight ahead clearly, but not what is at the sides
- A dark spot on the colored part of the eye (the iris) that is getting bigger
Pain is quite rare unless the cancer has spread to the outside of the eye.