middle-term
1.Build up the district sequence stratigraphic framework, and divide T_3x~2 and T_3x~3 into two long-term(LSC_3-LSC_4), ten middle-term (MSC_7-MSC_(16)) and Several tens short-term cycle;
3.Generally, comparing with actual data of load the middle-term load forecasted by regression analysis method often contains notable error.
4.Objective:To study on mathematic relationship with Gullstrand exact model eye(No.1)′s parameters of refraction in situ keratomileusis and evaluate the middle-term efficacy and safety of laser in situ keratomileusis(LASIK)for extremely high myopia(with a preoperative refraction more than-10.00 diopters).

