The pathogenesis of chronic obstructive pulmonary disease is the dysfunction of qi-blood-body fluid.By the analysis of the pathogenesis of different stages of COPD,qi deficiency,phlegm,blood stasis is the key to COPD.According to the pathogenesis of syndrome differentiation,a good curative effect can be achieved by the selection of different treatment methods like tonifying qi,eliminating phlegm and removing blood stasis.

Objective To detect the dynamic visual acuity ( DVA) before and after vestibular habituation of subjects in order to optimize the DVA assessment criteria .Methods The vestibular function examination system was applied to the detection of static and dynamic visual function in 16 healthy subjects .Results When the speed of left or right swinging was fast enough , DVA before and after vestibular habituation was different .Conclusion Subjects with vestibular habituation can reduce their sensitivity to the vestibular system , the changes in DVA are better than before habituation , and the vestib-ular function adaptability training may have effect on DVA .