 This particular type of ptosis 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 ptosis by applying ice onto the eyelids.Patients with myasthenic ptosis are very likely to still experience a variation of the drooping of the eyelid at different hours of the day.