Factors affecting noncontact intraocular pressure in myopic patients

Objective To investigate the factors influencing the noncontact intraocular pressure(IOP)in myopic patients and to discuss the clinical implication of IOP measurement.Methods The IOP of 406 eyes in 228 randomly selected myopic patients(16 to 72 years old)were measured by noncontact tonometer;the central corneal thickness(CCT),curvature,diopter and axial length were also measured.The factors influencing the IOP values were analyzed.Results The noncontact IOP of myopic patients was not associated with ages or curvature,but was positively correlated with CCT and axial length(r=0.429,0.160; P0.01,0.05),and the linear regression equations were Y=-9.318+0.044X andY=9.023+0.209X,respectively.Conclusion The present study sug- gests that the noncontact IOP is related to CCT and axial length,which has important clinical implication in evalua- ting actual IOP.