>>>Is optometrist norsk? Neat.
>>
>>No, in Norwegian (norsk) it's optiker.
>
>So where does it come from?

See http://www.bls.gov/oco/ocos073.htm.

An optometrist is an "eye doctor" which is a registered title, meaning that you are not allowed to call yourself an optometrist unless you have the necessary education. However, I realize that the correct translation for "optiker" is optician, a title you can claim without any formal education, as far as I know. Personally I prefer to go to an optometrist.