92004 without question as long as the criteria for using the code are met, which I'll assume they were since the exam is described as "comprehensive." Why would you use a 92002, which pays about $80, when you've done the work for a 92004 which pays about $150? Also, if a refraction was done, remember to bill the 92015 and charge the patient for that service, which they would most likely pay out of pocket because very few medical plans pay for that code.
Tom Cheezum, O.D., CPC, COPC