Short answer · Medically reviewed summary · Last updated: 2023-07-13
Marcus Gunn Syndrome, also known as Marcus Gunn Jaw-Winking Syndrome or Jaw-Winking Phenomenon, is a rare congenital disorder that affects the movement of the eyelids. It is characterized by an abnormal reflex where the affected individual's eyelid elevates or winks when they perform certain movements, such as opening their mouth, chewing, or swallowing. The prevalence of Marcus Gunn Syndrome is relatively low, making it a rare condition.
What is the prevalence of Marcus Gunn Syndrome?
Prevalence of Marcus Gunn Syndrome: how many people are affected worldwide, differences by sex and region, with sources.
Marcus Gunn Syndrome, also known as Marcus Gunn Jaw-Winking Syndrome or Jaw-Winking Phenomenon, is a rare congenital disorder that affects the movement of the eyelids. It is characterized by an abnormal reflex where the affected individual's eyelid elevates or winks when they perform certain movements, such as opening their mouth, chewing, or swallowing.
The prevalence of Marcus Gunn Syndrome is relatively low, making it a rare condition. Exact statistics on its occurrence are limited, but it is estimated to affect approximately 1 in 27,000 to 1 in 30,000 individuals.
This syndrome is typically present at birth and is more commonly observed in females. While the exact cause of Marcus Gunn Syndrome is not fully understood, it is believed to result from a developmental abnormality in the trigeminal nerve, which controls the movement of the jaw muscles and the eyelids.
Although Marcus Gunn Syndrome is generally harmless and does not cause any significant vision problems, it can lead to self-consciousness or social discomfort due to the noticeable eyelid movement. In some cases, surgical intervention may be considered to correct the abnormality and improve the individual's quality of life.
