An ophthalmic medical device including a photochromic polymer having higher transparency under an inactive state through use of a photochromic monomer. An ophthalmic medical device according to one embodiment that includes a photochromic polymer obtained by polymerizing monomer components including a photochromic monomer and a lactam ring-containing monomer, wherein a content ratio of the lactam ring-containing monomer in the monomer components is from 10 wt % to 50 wt %. The ophthalmic medical device is typically a contact lens or an intraocular lens.