Myasthenia gravis is a common neurogenic<unk> which could be also classified as neuromuscular<unk> because the site of pathology is at the neuromuscular junction. Studies have shown that up to 70% of myasthenia gravis patients present with<unk>  and 90% of these patients will eventually develop<unk>  In this case,<unk> can be unilateral or bilateral and its severity tends to be oscillating during the day, because of factors such as fatigue or drug effect. This particular type of<unk> is distinguished from the others with the help of a Tensilon test and blood tests. Also, specific to myasthenia gravis is the fact that coldness inhibits the activity of cholinesterase, which makes possible differentiating this type of<unk> by applying ice onto the eyelids. Patients with myasthenic<unk> are very likely to still experience a variation of the drooping of the eyelid at different hours of the day.<unk> caused by oculomotor palsy can be unilateral or bilateral, as the subnucleus to the levator muscle is a shared, midline structure in the brainstem. In cases in which the palsy is caused by the compression of the nerve by a tumor or aneurysm, it is highly likely to result in an abnormal ipsilateral papillary response and a larger pupil. Surgical third nerve palsy is characterized by a sudden onset of unilateral<unk> and an enlarged or sluggish pupil to the light. In this case, imaging tests such as CTs or MRIs should be considered. Medical third nerve palsy, contrary to surgical third nerve palsy, usually does not affect the pupil and it tends to slowly improve in several weeks. Surgery to correct<unk> due to medical third nerve palsy is normally considered only if the improvement of<unk> and ocular motility are unsatisfactory after half a year. Patients with third nerve palsy tend to have diminished or absent function of the levator. When caused by Horner's syndrome,<unk> is usually accompanied by miosis and anhidrosis. In this case, the<unk> is due to the result of interruption innervations to the sympathetic, autonomic Muller's muscle rather than the somatic levator palpebrae superioris muscle. The lid position and pupil size are typically affected by this condition and the<unk> is generally mild, no more than 2 mm. The pupil might be smaller on the affected side. While 4% cocaine instilled to the eyes can confirm the diagnosis of Horner's syndrome, Hydroxyamphetamine eye drops can differentiate the location of the lesion. Chronic progressive external ophthalmoplegia is a systemic condition which usually affects only the lid position and the external eye movement, without involving the movement of the pupil. This condition accounts for nearly 45% of myogenic<unk> cases. Most patients develop<unk> due to this disease in their adulthood. Characteristic to<unk> caused by this condition is the fact that the protective up rolling of the eyeball when the eyelids are closed is very poor.
Ptosis 
Photophobia
Mydriasis
Cynanthropy
Pityriasis
Facial toning
Athetosis
Iontophoresis