Causes Of Eye Miosis

Eye miosis refers to a condition in which the pupils of the eyes shrink to an abnormally small size despite being under normal lighting conditions. The condition is also commonly referred to as 'pinpoint pupils.' A small but important part of the eye, the pupils control the amount of light allowed to enter the eyes. They usually constrict and become smaller in bright light, an involuntary reflex that optimizes vision. However, this reflex can sometimes occur at inappropriate times and for various reasons. These can cause vision and adjustment issues that must be corrected using specialized dilating drops or by addressing any of the following underlying causes.

Horner's Syndrome

Horner's syndrome is a rare condition that affects the communication between the brain and one side of the face. When the nerve pathway connecting the brain and the face is disrupted, signals become altered or are not delivered at all. Individuals with this condition may have one pupil smaller than the other, as well as a droopy eyelid, or decreased sweating on one side of the face. Horner's syndrome can be inherited, develop after an injury or surgery involving the neck or spine, or be an after-effect of a stroke. Treatment is not exclusive to the syndrome; rather, the goal is to restore normal nerve functioning so electric signals can be properly sent and received.

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