FAP and Your Eyes

FAP and Your Eyes
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Familial amyloid polyneuropathy (FAP) is a disorder in which abnormal clumps of proteins called TTR amyloids accumulate in tissues and organs, interfering with their function. The aqueous humor of the eyes is one place where TTR amyloids accumulate. This is the jellylike substance that makes up most of the eye’s volume. This accumulation can cause an array of eye problems.

What problems can FAP cause to your eyes?

TTR amyloids that form in the aqueous humor can cause opacities or areas where the eye is cloudy. These can lead to vision problems similar to cataracts. Patients also may have dry eyes and abnormalities in the pupils and blood vessels of the eye. Some patients may develop glaucoma — high pressure in the eyes which can lead to blindness. Others may experience optic neuropathy or damage to the optic nerve. The optic nerve carries visual information from the eye to the brain. If it cannot function normally, vision may be lost.

How do doctors diagnose eye problems?

If you have FAP, you should see an ophthalmologist to determine whether the disease is affecting your eyes. As your disease progresses, regular check-ups can identify vision problems so they can be treated in a timely manner.

A normal eye exam may not be able to identify amyloids in the eyes. However, it can detect changes in vision, early signs of glaucoma, and changes in eye health (such as pupil or blood vessel abnormalities), which can indicate that further testing or treatment may be necessary.

There are new non-invasive eye tests that researchers are developing, which one day may be able to detect amyloids in the eyes.

How do doctors treat eye problems in FAP?

No cure for FAP exists yet, but there are treatments that can help manage symptoms and slow disease progression. Doctors also can treat some vision problems that FAP causes.

For example, they may treat patients in the early stages of glaucoma with eye drops that help reduce pressure in the eye. When medications are not available or effective, a type of surgery called filtration surgery, also know as trabeculectomy, might be necessary. For patients with optic nerve damage as a result of FAP, treatments may not be effective in slowing or preventing loss of vision.

 

Last updated: July 30, 2020

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FAP News Today is strictly a news and information website about the disease. It does not provide medical advice, diagnosis, or treatment. This content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website

Emily holds a Ph.D. in Biochemistry from the University of Iowa and is currently a postdoctoral scholar at the University of Wisconsin-Madison. She graduated with a Masters in Chemistry from the Georgia Institute of Technology and holds a Bachelors in Biology and Chemistry from the University of Central Arkansas. Emily is passionate about science communication, and, in her free time, writes and illustrates children’s stories.
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Özge has a MSc. in Molecular Genetics from the University of Leicester and a PhD in Developmental Biology from Queen Mary University of London. She worked as a Post-doctoral Research Associate at the University of Leicester for six years in the field of Behavioural Neurology before moving into science communication. She worked as the Research Communication Officer at a London based charity for almost two years.
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Emily holds a Ph.D. in Biochemistry from the University of Iowa and is currently a postdoctoral scholar at the University of Wisconsin-Madison. She graduated with a Masters in Chemistry from the Georgia Institute of Technology and holds a Bachelors in Biology and Chemistry from the University of Central Arkansas. Emily is passionate about science communication, and, in her free time, writes and illustrates children’s stories.
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