3 months， and 6 months after surgery compared with that before surgery (P>0.05). Before surgery and 3 d，1 month， 3 months， and 6 months after surgery， the thickness of the macular fovea of group A were (232.25±16.90)， (236.21±16.16)， (235.17±6.68)， (232.58±16.55) and (232.17±16.58) μm. 3 d， 1 month after surgery， the thickness of the macular fovea of group A increased compared with that before surgery ......