Objective  To compare the architecture and wound edema degree changes of clear-corneal 3.0 mm incisions and 2.2 mm incisions after cataract removal. Methods  It was a prospective randomized controlled study. Fifty-eight eyes of 35 age related cataract patients were included and the density of all the cataracts varied from grade Ⅱ to Ⅲ （Emery-Little′s classification）. Patients were randomized to have phacoemulsification through a small-incision （3.0 mm， n=30） or clear corneal microincision （2.2 mm， n=28） by random digital table. Anterior segment optical coherence tomography evaluation was performed at 2 hours， 1 week， 1 month and 3 months after surgery. Incisional corneal thickness and wound architecture， including epithelial gaping， endothelial gaping， local detachment of Descemet′s membrane and loss of coaptation， were assessed. Independent sample t test， nonparametric Wilcoxon rank-sum test and Chi-square test were used for data analysis. Results  There was no statistically significant difference in incisional corneal edema degree between 2 groups at all time points. At 2 hours after the surgery， the difference between 2 groups in the occurrence of epithelial gaping， endothelial gaping， local detachment of Descemet′s membrane and loss of coaptation was not statistically significant. At 1 week postoperatively， the incidence of epithelial gaping was higher in the 3.0 mm group than 2.2 mm group and the statistical difference was significant （23% vs 4%， χ²=5.192， P<0.05）. All different morphological incisions in both group recovered at 3 months postoperatively. Conclusion  Compared to the traditional small-incisions， the wound morphological characteristics of microincisions might recover faster in the cataracts varying from grade Ⅱ to Ⅲ.