AIM:To observe the clinical characteristics of palm video keratitis and analyze the pathogeny. And to explore methods to cure and prevent it.

METHODS:A total of 591 patients were randomly selected. Firstly, the frequency of staring at palm video equipment were investigated and break-up time of tear film with slit-lamp were observed. Then the data were calculated and the clinical characteristics were described. Finally, the correlation between incidence rate and the two factors were analyzed by SPSS13.0 respectively.

RESULTS:The incidence rate of palm video keratitis increased along with the frequency of staring at palm video equipment and decreased along with break-up time. There was significant relationship between incidence rate and the two factors respectively.

CONCLUSION:It is the most important pathogeny that staring at palm video equipment ahead and down for a long time which cause the change of tear film. That can reduce the frequency of using palm equipment and drop artificial tears to prevent and cure the disease.