[Focus on the challenge of basic research on corneal tissue engineering].

Great progress has been made on the corneal tissue engineering in the past two decades. Much knowledge has been gained on the seed cells, carrier material, and strategies of corneal tissue reconstruction. However, there are still great challenges regarding the basic research of corneal tissue engineering, such as selection of appropriate carrier and cells, optimization and standardization of the construction method, and evaluation of the clinic outcome. Future studies may address these questions and bring tissue engineered cornea into clinic application.