Morning pedants! Quick question-Ophthalmic or Opthalmic?

[waitingforgodot]

I had written the latter however it came up in a Word spell check so looked in the online dictionary where both are listed!
How would you spell it?

Opthalmic

the second one.

Opthalmic. First option doesn't make sense to me or look right!

I can always count on my fellow pedants in a time of need. Merci x

I know it looks odd, but in the UK is def ophthalmic - I have worked for an eye surgeon in the past, and although I am now almost totally without brain cells, I'm pretty confident I'm right . The other spelling is prob the American version...

Fruitloaf, you are right according to the Cambridge Dictionary online.

My very old dictionary of etymology gives

ophthalmia: from Greek ophthalmos (eye), so ophthalmic