You should talk w/ your doctor about this. Instead of stopping the prednisolone acetate
drops suddenly after daily use, maybe you could talk w/ your doc. about taking them every other day for a week, then every two days for a week, etc. until you've completely stopped. After prolonged use of any sort of steriod it takes the body a while to readjust, so this maybe the reason for your pain, or you may have developed chronic inflammation, such as uveitis.