What is muscle of muller?

The muscle of Muller is a small, smooth muscle located on the upper eyelid. It is responsible for elevating the eyelid and helping to maintain its position. The muscle is named after its discoverer, Hermann Muller, a German ophthalmologist who first described it in 1866. Dysfunction of the muscle of Muller can lead to ptosis, or drooping of the eyelid, which can cause vision problems and aesthetic concerns. Treatment for ptosis may include surgery to repair the muscle or the use of a ptosis crutch, which is a small device that helps support the eyelid.