Myasthenia gravis includes the generalized type as well as the ophthalmic type. The ophthalmic type mainly causes weakness in eyelid lifting. This is caused by drooping eyelids, which can be relieved by giving children Neostigmine. The second is due to eyelid trauma, which can also cause the affected eye to look smaller if the child has had trauma to the eyelid. In addition, it is caused by pressure from intracranial tumors, which often cause the affected side of the eye to be smaller.