I don't think an OD/PA is really as far fetched as some of you think. I've never met an OD who also went to PA school, but a couple message boards have posts stating that having both degrees allowed injections, Rxing that otherwise would not be allowed, and access to medical insurance plans that otherwise would be denied by "only" having an OD degree.
Also, from what I understand (and this surely differs by state), a PA's scope of practice is determined by the supervising physician and what the PA feels comfortable with. So, from a legal standpoint a PA can do ocular injections and could even perform cataract surgery assuming the MD is crazy enough to allow it. There's your ticket to being an optometric physician surgeon, oculomotor: a PA degree.
Wasn't there a rumor last year that PCO was considering a joint OD/PA program?