Is eyecare one word or two?

The one-Word form is occurring more frequently, especially when used in adjectival form and in the eyecare business, in which I am employed. "Eyecare" doesn't appear in most dictionaries, apparently because assumption is that it is two Words, and "eye care" is the more common spelling. However, in my opinion, logic and the spelling evolutionary process (two Words, then hyphenated, then one Word) favor the one-Word spelling "eyecare". -CRM