Lid lag
Lid Lag
Lid lag (/lɪd læg/) is a medical term referring to the condition where the upper eyelid fails to descend when a person moves their gaze downward. It is often associated with various thyroid disorders, particularly Graves' disease.
Etymology
The term "lid lag" is derived from the English words "lid", referring to the eyelid, and "lag", meaning to fail to keep pace or to fall behind. The term was first used in medical literature in the early 20th century.
Related Terms
- Graves' disease: An autoimmune disorder that results in the overproduction of thyroid hormones.
- Hyperthyroidism: A condition in which the thyroid gland produces too much thyroid hormone.
- Hypothyroidism: A condition in which the thyroid gland does not produce enough thyroid hormone.
- Thyroid eye disease: A condition that occurs when the immune system attacks the muscles and other tissues around the eyes. It can cause lid lag.
Symptoms
Lid lag is often a symptom of an underlying condition, such as Graves' disease or other thyroid disorders. It can cause the upper eyelid to retract, revealing the white part of the eye above the iris. This can lead to symptoms such as:
- Difficulty closing the eyes
- Eye discomfort or pain
- Sensitivity to light
- Blurred or double vision
Diagnosis
Diagnosis of lid lag is typically made through a physical examination of the eyes. The doctor may ask the patient to move their gaze up and down to observe the movement of the eyelids. Further tests may be conducted to determine the underlying cause of the lid lag, such as blood tests to check thyroid hormone levels.
Treatment
Treatment for lid lag usually involves addressing the underlying cause. This may involve medication to regulate thyroid hormone levels in cases of Graves' disease or other thyroid disorders. In some cases, surgery may be required to correct the position of the eyelids.
External links
- Medical encyclopedia article on Lid lag
- Wikipedia's article - Lid lag
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