 Dysfunctions of the levators may occur as a result of autoimmune antibodies attacking and eliminating the neurotransmitter.Ptosis may be due to a myogenic, neurogenic, aponeurotic, mechanical or traumatic cause, and it usually occurs isolated, but may be associated with various other conditions, like immunological, degenerative, or hereditary disorders, tumors or infections.Acquired ptosis is most commonly caused by aponeurotic ptosis.