Using Three Dimensional Magnetic Resonance Imaging Technology To Study The Relationship Between Pathological Myopia Fundus Lesions And Ocular Morphology

Objective:To implore the classification of pathological myopia ocular shape in 3dimensions magnetic resonance imaging(3D-MRI),the incidence rate of ocular morphology classification in different pathological myopia fundus lesion,and the relationship between ocular shape and age,axis oculi length,diopter,and fundus lesion types.Methods:This observational study divided 58 pathological myopia patients(104 eyes)into groups by age(<60 years and≥60 years),axis oculi length(<29 mm and≥29 mm),diopter(-6.00≤D<-12.00 D、-12.00≤D<-18.00 D,and≥-18.00D),and fundus lesions(pathological myo pia choroidal neovascularization,foveoschisis,macular hole retinal deta chment,and chorioretinal atrophy).All the patients were examined for diopter,dilated pupil for fundus examination,fundus photography,optic al coherence tomography angiography,magnetic resonance orbital scann ing.To observe the incidence rate of various ocular shape and compar e the differences between different age groups,axis oculi length group s,diopter groups,and fundus lesion groups.Results:Pathological myopia ocular shape was divided into ellipsoidal shape14eyes,conical shape 26 eyes,distorted shape 36 eyes,and barrel shape 28eyes according to clinical experiences and 3D-MRI results.10 eyes for pathological myopia choroidal neovascularization contained 4 eyes,(accounting for 40.0%of the 10 eyes)for conical shape and distorted shape,respectively,and 2 eyes,(accounting for 20.0%of the 10 eyes)for ellipsoidal shape.8 eyes for pathological myopia foveoschisis contained 4 eyes,(accounting for 50.0%of the 8 eyes)for distorted shape,and 4 eyes(50.0%)for barrel shape.6 eyes for pathological myopia macular hole retinal detachment contained 4 eyes(accounting for 66.7%of the 6 eyes)for barrel shape,and 2 eyes(33.3%)for distorted shape.80 eyes for pathological myopia chorioretinal atrophy contained 26 eyes(accounting for 32.5%of the80 eyes)for distorted shape,22 eyes(27.5%)for conical shape,20eyes(25.0%)for barrel shape,and 12 eyes(15.0%)for ellipsoidal shape.The distribution of the four types ocular shape had statistical significance between different age groups,axis oculi length groups,and diopter groups(χ~2=10.43,44.13,48.93;P<0.05),but no in fundus lesion groups(χ~2=15.59,P>0.05).Conclusion:3D-MRI can directly and comprehensively show ocular shape.Pathological myopia ocular shape is related to age,axis oculi length,and diopter.Ocular shape of pathological myopia choroidal neovascularization,foveoschisis,chorioretinal atrophy tend to distorted shape and conical shape,while macular hole retinal detachment did to barrel shape.