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Long COVID link to corneal nerve damage

Nerve fibre loss and an increase in key immune cells on the cornea may be an identifying feature of 'long COVID', suggests a small study published in the British Journal of Ophthalmology.

The findings show that these changes - identified through corneal confocal microscopy (CCM) - were particularly evident among those with neurological symptoms, such as loss of taste and smell, headache, dizziness, numbness, and neuropathic pain, following COVID-19 infection.

"We show that patients with long COVID have evidence of small nerve fibre damage which relates to the severity of long COVID and neuropathic as well as musculoskeletal symptoms." the researchers said.

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