Ptosis


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to Ptosis: Horner's syndrome

ptosis

[′tō·səs]
(medicine)
Prolapse, abnormal depression, or falling down of an organ or part; applied especially to drooping of the upper eyelid, from paralysis of the third cranial nerve.

Ptosis

 

drooping of the upper eyelid. It may be unilateral or bilateral, total or partial, or congenital or acquired. Congenital ptosis is caused by incomplete development or absence of the muscle that lifts the upper lid. The condition is treated by surgery.

Acquired ptosis is generally unilateral; it results from such diseases as neuritis of the oculomotor nerve and encephalitis, which lead to paresis or paralysis of the oculomotor nerve that innervates the muscle lifting the upper lid. The condition is treated by eliminating the underlying disease, by physiotherapy, and occasionally by surgery.

References in periodicals archive ?
In addition to a thorough ophthalmic examination, the evaluation of ptosis should include some important eyelid measurements, including (4,5):
Other signs to look for are external ophthalmoplegia (vertical deviation and exotropia in the side of the dilated pupil) inducing diplopia and upper lid ptosis.
The procedure itself must be tailored to the characteristics of the individual patient, primarily the degree of tip ptosis and the contribution of the various anatomic elements.
Which medical condition will have symptoms that CANNOT be assisted by a ptosis prop?
6, functional cranial settling was associated with notable displacements that included reduction of the basion-dens interval, posterior gliding of the occipital condyles, anterior flexion of the occipitoatlantal joint, increased basilar impression, and cerebellar ptosis with downward displacement of the cerebellar tonsils.
Among the other treatments for facial nerve paralysis are ptosis repair, selective myectomy, and selective neurectomy.
How can you tell if your eyelid ptosis is cosmetic or functional?
When the upper eyelid retractors, and especially the ligaments, become lax, then the upper eyelid starts to droop--a ptosis is caused and this is the primary sign of vertical lid laxity.
The two men did not have brachycephaly or proptosis, but they did have ptosis and a mixed-type hearing loss.
Blepharospasm: The most common adverse reactions (incidence greater than or equal to 10% of patients and twice the rate of placebo) for XEOMIN were eyelid ptosis (19%), dry mouth (16%), visual impairment (12%), diarrhea (8%), and headache (7%).
In order to reduce the complication of ptosis the following steps should be taken:
10) Congenital bilateral or unilateral ptosis can also be seen in children with NF-1 and an urgent referral to ophthalmology and early management might prevent, or at least reduce, the degree of amblyopia; ptosis can occut secondary to a neurofibroma of the upper eyelid too.