Sorry to hear about your husband. Yes, in 50% of cases of MEWDS patients also have viral symptoms. There is still no known cause.
MEWDS is a self-limited disease with almost all patients regaining good visual acuity within 3-9 weeks. Consequently, no treatment is recommended for patients with MEWDS. The lesions disappear without scarring, and photopsias and scotomata gradually resolve. Occasionally, patients with MEWDS may have persistent blind spot enlargement. Although uncommon, recurrences can occur. However, the prognosis is fairly good for these patients. A rare complication of MEWDS is choroidal neovascularization that may require laser photocoagulation.
Good luck, here's hoping this all clears up soon.
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