tokens: Local anesthetics that are commonly used in ophthalmic surgery ( 0 . 75 % bupivacaine hydrochloride , 2 . 0 % mepivacaine hydrochloride , and 2 . 0 % lidocaine hydrochloride plus 1 : 100 , 000 epinephrine ) were injected into the retrobulbar area of rat eyes .