Argyll Robertson's pupil is a medical condition that is characterized by an abnormally small pupil size in both eyes. It is named after the Scottish ophthalmologist Douglas Argyll Robertson. It is sometimes referred to as the Argyll-Robertson syndrome. The condition is usually associated with neurosyphilis, a form of syphilis that affects the nervous system. In some cases, it can also be caused by other diseases, such as diabetes, multiple sclerosis, or brain tumors.
The condition is diagnosed by an ophthalmologist who performs a physical examination of the eyes. The Argyll Robertson's pupil is characterized by a constriction of the pupil that does not respond to light. This is called an Argyll Robertson's sign. Other signs that may be present include decreased vision, blurred vision, and an inability to focus.
Treatment for Argyll Robertson's pupil depends on the underlying cause. For neurosyphilis, a course of antibiotics is usually prescribed. If the condition is caused by diabetes, multiple sclerosis, or a brain tumor, the condition may need to be managed with medication or surgery.
In some cases, the Argyll Robertson's pupil may resolve on its own without any treatment. However, if the underlying cause is not treated, the condition may become permanent, leading to a decrease in vision and other vision-related problems.