Just wondering.. why? I'm ophtho, and if you're switching because the reimbursements to rads is getting cut then the reimbursements to ophtho are also getting cut, have been getting cut for a longer time, and are still much lower than rads. Cataract surgery reimbursement (our main procedure) has gone down from about $2500 in 1990 to $600 now. If you're worried about job prospects, the prospects aren't much better in ophtho unless you move to a rural area; you'll often still need a fellowship in ophtho to get a decent job. In terms of work hours, you'll be surprised at how hard ophtho residents and fellows at large trauma hospitals need to work; attendings may have it easier (I hope).
What's wrong with rads? IR and Mammo seem to still have a decent job market; much higher pay than ophtho; and if you're looking for patient interaction, they have that too.