A doctor will first perform a physical exam with questions about the patient's medical history to distinguish whether the condition may be hereditary. A slit lamp exam is performed with a high-intensity light that allows a close look at the patient's eyes. The doctor can also perform a test in which edrophonium is injected into a vein and the eyelids are monitored for resulting signs of improvement. A visual field test, which assesses the degree to which the<unk> affects the superior vision, may be performed. Because nerve damage is among the possible causes for<unk>  the ophthalmologist will check the patient's pupil for abnormalities. The doctor will also check muscle function. The ophthalmologist may also measure the degree of the eyelid droop by measuring the marginal reflex distance, which is the distance between the center of the pupil and the edge of the upper lid, as well as the strength and function of the patient's levator muscle. This test entails holding the frontalis muscle to measure how far the eyelid travels when the patient is gazing downward. Through these tests, the ophthalmologist may properly diagnose<unk> and identify its classification, and a determination may be made regarding the course of treatment, which may involve surgery. Classification Mild right eyelid<unk> Depending upon the cause,<unk> may be classified into: *Neurogenic<unk>  which includes oculomotor nerve palsy, Horner's syndrome, Marcus Gunn jaw winking syndrome and third cranial nerve misdirection. *Myogenic<unk>  which includes oculopharyngeal muscular dystrophy, myasthenia gravis, myotonic dystrophy, ocular myopathy, simple congenital<unk> and blepharophimosis syndrome. *Aponeurotic<unk>  which may be involutional or postoperative. *Mechanical<unk>  which is the result of edema or tumors of the upper lid. *Neurotoxic<unk>  which is a classic symptom of envenomation by elapid snakes such as cobras, kraits, mambas and taipans. Bilateral<unk> is usually accompanied by diplopia, dysphagia and/or progressive muscular paralysis. Neurotoxic<unk> is a precursor to respiratory failure and eventual suffocation caused by complete paralysis of the thoracic diaphragm. It is therefore a medical emergency and immediate treatment is required. Similarly,<unk> may occur in victims of botulism (caused by botulinum toxin), and this is also regarded as a life-threatening symptom. *Pseudoptosis resulting from lack of lid support (empty socket or atrophic globe) or a higher lid position on the other side, as in lid retraction. Hollywood actor Forest Whitaker has a left eye<unk>
Ptosis 
Photophobia
Mydriasis
Cynanthropy
Pityriasis
Facial toning
Athetosis
Iontophoresis