AIM:To discuss the major determinant factors of visual pro-gnosis of mechanical ocular trauma by statistical analysis and retrospective study of the 300 patients. ·METHODS:This is a retrospective study on 300 cases with mechanical ocular trauma in recent 5 years.We recorded and analyzed the following details:general state of health,left or right eye,cause of injury,whether treated in time,vision of admission,vision of discharge. ·RESULTS:Sex distribution:male 8/9,female 1/9. Most of patients fell in the age group of between 5-10 and 35-45,and with the highest sex distribution of 14:1 at the age group of 15-20. Open wound of eyeball,ocular and its appendages contusion were most frequently seen. Injury caused by foreign object was most frequently seen in open wound of eyeball. Most of patients had a significant visual improvement at the time of discharge (P<0.05). The major determinant factors of the visual prognosis after treatment were summarized as following:causes of the injury;whe-ther treated within 24 hours. ·CONCLUSION:Most of the ocular trauma comes from blunt injury,sharp instrument injury and explosion injury. The major determinant factors of the visual prognosis after treatment are summarized as following:cause of the injury,whether treated within 24 hours.