Clinical Application Of Microperimeter 1 In Myopia

ObjectiveTo define the early stage changes of micro-view visual field in different degrees of myopia using micro-perimetry (microperimeter, MP-1) to detect the macular retinal light sensitivity and to provide the basis for its clinical applications.MethodsOf 32 (60 eyes) myopia patients with corrected visual acuity≥1.0 from excimer laser surgery section of our hospital and 10 cases (20 eyes) emmetropia volunteers were collected in this study, aged 17-35 years old with averaged 26. All cases were divided into the myopia group and the control group according to the refraction diopter. Myopia group was subdivided into three subgroups of mild, medium and high. Micro-perimeter (microperimeter, MP-1) examination was applied for each group with 29 sites stimulation (GoldmanⅢ, stimulus duration of 200ms, a white background 4asb). The different degrees of myopia within 20°macular changes in retinal light sensitivity was analyzed. SPSS 13.0 statistical software was used for statistical analysis.ResultsThere was no statistical differences between mild and medium myopia on MP-1 results (P>0.05). However, the macular sensitivity in high myopia group showed obvious decreases than other groups including normal eyes, mild myopia and medium myopia (P<0.05).Conclusions1. MP-1 has high sensitivity in detecting macular visual function of myopic patients.2. With the increase in myopia, macular retinal light sensitivity values tended to decrease.3. Macular retinal light sensitivity values of the high myopia patients decreased significantly compared with emmetropia.