Umbilical Cord Mesenchymal Stem Cells Injection for Ocular Corneal Burn

Inclusion Criteria: * must be ocular burns including chemically burned or the thermally burned; * the subjects are willing to accept this research, and promise to coordinate with the researchers during the follow up period; * the subjects should abide by the laws and rules of the study. Exclusion Criteria: * the visual acuity is blind in any of the eye; * have corneal perforation or have the corneal perforation tendency; * have been accepted surgery on eyeball after trauma; * IOP\>=25 mmHg even after antiglaucoma; * have the history of other corneal disease or surgery; * have the history of radiotherapy or surgery in the eyeball; * associated with corneal ulcer or endoophthalmitis; * uncontrolled hypertension(\>=150/95 mmHg); * abnormal liver and renal function; * the pregnant women.