Lyme disease can cause inflammation in the eyes and affect how they function in other ways, which leads to a sensitivity to light. Some of these changes can occur after treatment and may signify neurologic or cognitive impairment and hint at the severity of the illness.
Lyme can also cause uveitis, a swelling of the middle layer of the eye, or scleritis, an inflammation of the white part of the eye, both of which cause light sensitivity.

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