Sensory exotropia subsequent to senile cataract

INTRODUCTION Sensory exotropia is a condition of unilateral divergence as a sequela to loss of vision or long-standing poor vision in one eye,which was caused by refractive errors,unilateral aphakia or other organic reasons.Convergence insufficiency or disruption is possible.The most important aspect of the manage-ment is to find and/or eliminate and/or reverse a treatable cause of the exotropia.In clinic,the sensory exotropia secondary to senile cataract was often ob-served.Prospectively…     

Corneal relaxing incision combined with phacoemulsification and IOL implantation

Objective: To analyze the effectiveness and safety of corneal relaxing incisions (CRI) in correcting keratometric astigmatism during cataract surgery. Methods: A prospective study of two groups: control group and treatment group. A treatment group included 25 eyes of 25 patients who had combined clear corneal phacoemulsification, IOL implantation and CRI. A control group included 25 eyes of 25 patients who had clear corneal phacoemulsification and IOL implantation.Postoperative keratometric astigmatism was measured at 1 week, 1 month, 3 months and 6 months. Results: CRI significantly decreased keratometric astigmatism in patients with preexisting astigmatism compared with astigmatic changes in the control group. In eyes with CRI, the mean keratometric astigmatism was 0.29±0.17 D (range 0 to 0.5 D) at 1 week, 0.41±0.21 D (range 0 to 0.82 D) at 1 month, respectively reduced by 2.42 D and 2.30 D at 1 week and 1 month postoperatively (P=0.000, P=0.000), and postoperative astigmatism was stable until 6 months follow-up. The keratometric astigmatism of all patients decreased to less than 1.00 D postoperatively. Conclusions: CRI is a practical, simple, safe and effective method to reduce preexisting astigmatism during cataract surgery. A modified nomogram is proposed. The long-term effect of CRI should be investigated.     

借助跨学科学习任务群 夯实学生综合素养

核心素养具有整体性、发展性、融合性等特征。通过地方研学旅行构建起的小学语文跨学科学习任务群,教师可以切实夯实学生的综合素养：“理实融通”,在融合中夯实综合素养;“跨界统整”,在整合中夯实综合素养;“任务驱动”,在实践中夯实综合素养。     

Corneal relaxing incision combined withphacoemulsification and IOL implantation

INTRODUCTION The advent of phacoemulsification, foldableintraocular lenses (IOLs), and improved incisiondesigns has decreased the incidence and extent ofsurgically induced astigmatism in cataract patients.Aproximately 15% to 20% of cataract patients,however, have more than 1.5 diopters (D) of kera-tometric astigmatism, refractive astigmatism, orboth (Hoffer, 1980). Interest in reducing preexist-ing astigmatism simultaneously with cataract sur-gery has grown in recent years. Availa…     

基于排队论模型的宝山引航作业区接送效率分析

为分析宝山引航作业区的接送效率,首先对宝山引航作业区72 h正常天气情况下引航交接的船舶数据进行统计,然后根据统计数据对船舶到达规律进行泊松流拟合检验.在船舶到达规律符合泊松分布的基础上,针对宝山引航作业区的特点建立排队论模型.分别对进出口船舶在高峰时期和普通情况下的通航状况进行分析,得出宝山引航作业区在高潮前后进口船舶较为拥挤、引航接送效率较低,每天18:00左右出口方向较为拥挤.针对特定时间进出口船舶拥挤问题,给出增加引航船艇数量的方法以提高接送效率.