Fish eye disease, also known as LCAT deficiency, is a rare inherited disorder that affects the body’s ability to metabolize and eliminate cholesterol. It is caused by mutations in the LCAT gene, which provides instructions for making an enzyme called lecithin-cholesterol acyltransferase (LCAT). This enzyme plays a key role in the metabolism of cholesterol by converting excess cholesterol in the bloodstream into a form that can be removed from the body.
In people with fish eye disease, the LCAT enzyme is either missing or not working properly, leading to a buildup of cholesterol in the bloodstream and the formation of small, yellowish-white deposits called fish eye lesions. These lesions can be seen in the clear part of the eye (the cornea) as well as in other parts of the body, such as the skin, joints, and tendons.
Symptoms of fish eye disease can vary depending on the severity of the condition. Some people may have no symptoms at all, while others may experience vision problems, such as clouded vision or blurred vision. In some cases, the fish eye lesions can cause discomfort or pain, particularly if they are located near a joint or tendon.
Diagnosis of fish eye disease typically involves a combination of clinical evaluation, blood tests to measure cholesterol levels, and genetic testing to confirm the presence of LCAT gene mutations. Treatment options for fish eye disease are currently limited and mainly focus on managing cholesterol levels through diet and medication. In some cases, people with severe fish eye disease may require kidney and/or liver transplants to manage the excess cholesterol buildup.
In conclusion, fish eye disease is a rare inherited disorder caused by mutations in the LCAT gene, leading to the buildup of cholesterol in the body and the formation of fish eye lesions. Diagnosis is typically based on clinical evaluation, blood tests, and genetic testing. Treatment options are currently limited and mainly involve managing cholesterol levels through lifestyle changes and medication.
