Hi.
Uveitis is not allergy, it is a separate entity.
It is totally curable if treated well.
But if not treated with caution, it may cause complications.
If it is secondary to some cause, then it may be recurrent (means it will come back, after stopping treatment)
Floater and flashes are seen in intermediate uveitis(which involve the internal part of eye)
Next Steps
you need to go through, checkup up
both eye, and some lab investigation.
Health Tips
consult good doctor, and in uveitis steroid are used commonly, so proper use and tapering is important. If not used properly it may cause complications like (cataracts and glucoma)