Immune system
Allergic conjunctivitis
Non-infectious · Acute or chronic
Inflammation of the clear lining of the eye caused by an allergic reaction, leading to itchy, red, watery eyes.
GeoMed · Eyes and vision conditions
Eyes and vision conditions
Causes, symptoms, diagnosis, treatment approaches and prevention for common conditions. Browse A–Z, by body system, or search.
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Nervous system
Anisocoria (unequal pupils)
Non-infectious · Acute or chronic
A difference in the size of the pupils, which can be harmless or a sign of a problem with the nerves that control the eye.