It will definitely be reimbursed. The basic medical insurance divides medical expenses into three categories: A, B and C, with A reporting in full, B 85% and C 85% at its own expense. Corneal transplantation has many B and C items, so you must pay more for it yourself than general surgery. You can consult the local medical insurance bureau for specific matters.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.