Sorry I missed this question - to answer, no they do not have to have silver eyes. Many will be born with silver eyes, but they will begin to shift toward brown and slight orange over time as they grow older. If you purchased it from Travis Kubes pythons you have a proper Anery, and it will prove out when you put it to a proper clutch, no worries there.

My pure SD Anery from Travis has slightly brown eyes, but was born with silver eyes, I'll try and post the 2 shots of it then and now. . .