Monocular means occurring in or affecting one eye.
When discussing Migraine disease and other headache disorders, we most often see the term monocular discussed in relation to retinal Migraine. One possible symptom of retinal Migraine is temporary blindness occurring in or affecting one eye.
You can read more about monocular blindness and retinal Migraine in:
Teri Robert is a leading patient educator and advocate and the author of Living Well with Migraine Disease and Headaches. A co-founder of the Alliance for Headache Disorders Advocacy and the American Headache and Migraine Association, she received the National Headache Foundation’s Patient Partners Award and a Distinguished Service Award from the American Headache Society. Teri can be found on her website, and blog, Facebook, Twitter, StumbleUpon, Pinterest, LinkedIn, and Google+.