Google translate automatic language recognition tells me that lense is a Norwegian word. I didn't find this word for any other language I suspected of being similar.
I wonder how many Norwegians we have on this forum?
The norwegian word for lens is "linse", although the word "objektiv" is acctually more commonly used when refering to a photographic lens. "Lense"(with the second "e" also being pronounced), is a verb meaning "to empty something of water".
When it comes to the lens vs lense discussion I did some searching, and it seems that "lense" is acctually listed as an alternative spelling in some dictionaries. It seems however that lens is regarded as the only correct spelling by most native english speakers.