is this something you have experienced before? what is your age? what medical problems if any do you have? how often were you asked to use the steroid eye drop?
for folks who present with their first episode and if they are mild (judged by your use of the drops for a relatively short amount of time) I would not order testing to determine the cause as at least 60% of the time, we dont find a cause. Repeat occurences would require a workup for underlying causes such as rheumatoid arthritis, reiter's syndrome, etc. I wish you well, Dr. Stevens