Objective To investigate the distribution and characteristics of normal corneal shape parameters in myopic astigmatism as well as relationship with ocular refractive parameters.Methods A total of 102 myopic patients(204 eyes) with astigmatism were collected,and the intraocular pressure,refraction pcular axis length,corneal thickness,anterior and posterior corneal surface shape were measured with non-contact tonometer,mydriatic optometry,A-scan,Pentacam scheimpflug system and ultrasonic pachymeter,respective...