lid lag

lid lag

The failure of the normal downward following movement of the upper lids on looking downward. Lid lag causes a strange staring appearance. It is a feature of undue protrusion of the eyes (EXOPHTHALMOS) and occurs in overactivity of the thyroid gland (THYROTOXICOSIS).
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About Graves' Orbitopathy Graves' Orbitopathy is an autoimmune inflammatory disorder affecting the orbit around the eye, characterized by upper eyelid retraction, lid lag, swelling (edema), redness (erythema), conjunctivitis, and bulging eyes (proptosis).
However, symptoms and signs that support hyperthyroidism include tremor, persistent tachycardia, weight loss and lid lag.
Specific signs in congenital ptosis are an absent lid crease, poor levator function, lid lag on downgaze and often associated superior rectus weakness.
Common signs and symptoms include upper eyelid retraction, lid lag with infraduction, widened palpebral fissure during fixation, and lagophthalmos.
Although clinical examination on ICU admission was negative for clinical signs consistent with a diagnosis of thyrotoxicosis (exophthalmos, lid lag, goitre), the presence of persistent tachycardia, together with occasional brief episodes of atrial fibrillation, prompted us to measure thyroid hormones as part of our diagnostic evaluation.
In addition to hair loss and a wide-eyed stare or proptotic appearance, physical findings may include localized myxedema (particularly pretibial), irritative keratoconjunctivitis, lid lag, diplopia, tachycardia, hyperactive reflexes, and smooth, warm, and velvety skin.
Eye lid lag and lid retraction can occur in any thyrotoxic state, but proptosis (bulging eye) is specific for Graves' disease.
He had mild bilateral proptosis, lid retraction and lid lag, and the thyroid gland was diffusely enlarged at about 40 g (normal 15-20 g).
An examination revealed that the patient had tachycardia (102 beats/min) but did not have proptosis, lid retraction, lid lag, or tremors.