retinoblastoma

Cancer of the eye is uncommon. It can affect the outer parts of the eye, such as the eyelid, which are made up of muscles, skin and nerves. If the cancer starts inside the eyeball it's called intraocular cancer. The most common intraocular cancers in adults are melanoma and lymphoma. The most common eye cancer in children is retinoblastoma, which starts in the cells of the retina. Cancer can also spread to the eye from other parts of the body.

Treatment for eye cancer varies by the type and by how advanced it is. It may include surgery, radiation therapy, freezing or heat therapy, or laser therapy.

Retinal disorders are conditions that affect the retina, the thin light-sensitive tissue at the back of your eye. The retina senses light and sends signals to your brain so you can see.

Retinal disorders can cause blurred or distorted vision. Some can lead to vision loss or blindness.

The causes of retinal disorders vary. Aging is a common factor, but other things can raise your risk, such as if you:

• Smoke
• Have obesity
• Have health conditions like diabetes or high blood pressure
• Have had an eye injury or trauma
• Have a family history of retinal disorders

Some common retinal disorders include:

• Macular degeneration. Occurs when the macula (the center of the retina that helps you see fine details) breaks down. There are two types: wet and dry macular degeneration.
• Diabetic retinopathy. Occurs when diabetes damages small blood vessels in the retina, causing them to swell or leak.
• Retinal detachment. Occurs when the retina pulls away from the back of the eye. This is a medical emergency.
• Retinal tears. A hole or break in the retina caused when the gel-like substance inside your eye (the vitreous) pulls away.
• Retinoblastoma. A rare cancer of the retina that most often affects young children.
• Macular pucker. Scar tissue that forms on the macula and distorts vision.
• Macular hole. A small opening in the macula, often related to aging or injury. It can blur or distort central vision.
• Eye floaters. Small specks, cobwebs, or threads that drift across your vision. These are more common with aging.
• Retina pigmentosa. A group of inherited disorders (passed down through families) that slowly damage the retina and cause loss of night and side (peripheral) vision.

Symptoms can vary, but most retinal disorders affect your vision. Common symptoms include:

• Blurred or distorted vision
• Loss of central or side (peripheral) vision
• Flashes of light
• Seeing floating specks or cobwebs
• Trouble seeing at night
• Sudden vision loss (in severe cases)

Seek medical care right away if you notice flashes of light, sudden vision changes, or a sudden increase in eye floaters. These can be signs of a serious retinal problem.

Eye care providers check for retinal disorders with a dilated eye exam. Eye drops are used to widen your pupils so your provider can look at the retina for signs of damage.

They may also do other tests, such as:

• Optical coherence tomography (OCT) to take detailed pictures of the inside of your eye.
• Fluorescein angiography to check the blood vessels in your retina.
• Visual field tests to measure your side (peripheral) vision.

Some retinal disorders can be treated to slow or stop vision loss, and sometimes to restore vision. Treatment depends on the cause and severity. It may include:

• Laser therapy
• Medicine or eye injections
• Surgery
• Lifestyle management to control health conditions such as diabetes or high blood pressure

Not all retinal disorders can be prevented. Some are related to aging or genetics. But you can protect your eyes by:

• Wearing safety goggles or sunglasses
• Getting regular eye exams
• Making healthy lifestyle changes, such as:
  • Quitting smoking (or not starting)
  • Managing diabetes and blood pressure

NIH: National Eye Institute