Microcoria
Microcoria (pronounced: mi-kro-kor-ee-uh) is a rare, congenital eye disorder characterized by an abnormally small pupil size. The term is derived from the Greek words 'micros' meaning small, and 'korē' meaning pupil.
Definition
Microcoria is a condition in which the diameter of the iris is typically less than 2mm, significantly smaller than the average pupil size of 2-4mm in normal light conditions. This condition is usually present at birth and can affect one or both eyes.
Causes
Microcoria is often associated with Pierson syndrome, a rare genetic disorder. It is caused by mutations in the LAMB2 gene, which is responsible for the production of a protein that is an essential component of the basement membrane in the kidneys and eyes.
Symptoms
The primary symptom of microcoria is small pupils, which can lead to reduced vision, nystagmus (involuntary eye movement), and strabismus (misalignment of the eyes). Other symptoms may include photophobia (sensitivity to light) and myopia (nearsightedness).
Diagnosis
Diagnosis of microcoria is typically made through a comprehensive eye examination. This may include a slit lamp examination, which allows the doctor to examine the structures at the front of the eye under high magnification.
Treatment
There is currently no cure for microcoria. Treatment is focused on managing the symptoms and may include the use of corrective lenses or surgery to correct strabismus or nystagmus. Regular eye examinations are recommended to monitor the condition.
See also
External links
- Medical encyclopedia article on Microcoria
- Wikipedia's article - Microcoria
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