Does rheumatiod arthist affect the eye? if so how can we prevent eye demage?

Yes: Uveitis is more familiar in sarcoidosis and juvenile rheumatoid arthritis; eye problems are famously seen in reactive arthritis (formerly misnamed "reiter's"), but if you have known RA and an uveitis, there's a fair chance that the arthritis is the cause, though one would not want to jump to that conclusion without ruling other entities in or out. Interdisciplinary consultation is in order.

Yes: Ra can affect the eye in many, many ways. The most common is probably simple dry eye. There are more severe manifestations as well including vasculitis, corneal melts, etc. Keeping the RA in check systemically is the best way of protecting the eye. Eye complications are a definite sign of RA that is not controlled adequately.