Abstract: Objective To explore the relationship between eyeball structure and visual acuity in high myopia.Methods Totally,152 people(283 eyeballs) with different levels of myopia were tested for visual acuity,axial length,and fundus.All cases were classified according to diopter,axial length,and fundus.The relationships between diopter,axial length,fundus and visual acuity were studied.The mathematical models were established for visual acuity and eyeball structure markers.Results The visual acuity showed a moderate correlation with fundus class,comus,axial length and diopter(|r|>0.4,P<0.000 1).The visual acuity in people with the axial length longer than 30.00 mm,diopter above-20.00 D and fundus in 4th class were mostly below 0.5.The mathematical models were established by visual acuity and eyeball structure markers.Conclusion The visual acuity should decline with axial length extension,diopter deepening and pathological deterioration of fundus.To detect the structure changes by combining different kinds of objective methods can help to assess and to judge the vision in high myopia.

Key words: forensic medicine, myopia, vision, low, fundus oculi, axial length, diopter