Paralysis of the muscles of the eye.
Condition characterized by paralysis of the motor nerves of the eyes, sometimes occurring in myasthenia gravis, botulism, thiamine deficiency, and disorders of the nerves of the cranial area.
Paralysis of the eye muscles. There are three types of ophthalmoplegia: internuclear (affecting the structures in the central nervous system that coordinate eye movements), external, and internal. Internuclear ophthalmoplegia, a type of motor disturbance of the eye, results from damage to the area of the brain that coordinates eye movement and can be caused by multiple sclerosis, ischemic vascular disease, or brain stem tumor. External ophthalmoplegia involves dysfunction of the extraocular muscles (which control the movement of the eye). Internal ophthalmoplegia involves disorders associated with dysfunction of the pupillary muscles (which control constriction of the pupils).
Paralysis of the muscles of the eye. Internal ophthalmoplegia affects the muscles inside the eye the iris (which controls the size of the pupil) and the ciliary muscle (which is responsible for accommodation). External ophthalmoplegia affects the muscles that move the eye.
Paralysis of the muscles of the eye. Internal ophthalmoplegia refers to paralysis of the iris and ciliary body; external ophthalmoplegia refers to paralysis of one or all of the muscles that move the eyes.
Ophthalmoplegia refers to the partial or complete paralysis of the eye muscles. It can result from diseases directly impacting the eye muscles, like Graves’ disease, or from conditions affecting the brain or nerves that serve the eye muscles. Examples of such conditions include stroke, brain tumors, encephalitis (brain inflammation), or multiple sclerosis.