角膜位于眼球的最前方,直接与外界接触,易受外伤与微生物的侵袭而引起病变。角膜上皮又系抵抗微生物的自然屏障,如此屏障被破坏,则易产生感染,有导致眼球损坏,视功能丧失的危险。已知维甲酸有刺激上皮细胞上皮细胞DNA的合成,因而能促使角膜上皮愈合。为此,作者用0.1%、 The cornea is located in the forefront of the eyeball, directly with the outside world, susceptible to trauma and microbial invasion caused by lesions. Corneal epithelium and the Department of microbial resistance to the natural barrier, so the barrier is damaged, it is easy to produce infection, leading to eye damage, loss of vision risk. Retinoic acid is known to stimulate epithelial cell DNA synthesis in epithelial cells and thus promote healing of the corneal epithelium. To this end, the author used 0.1%