... shuttle lens measuring range: 10Prism degree: 1Prism basal angle: 0 ~ 180°, Minimum scale value 1° Regulation ... .125D;-5D~-25D,+5D~+25D: 0.25DAstigmatism axis angle of cylindrical lens: 0~180°Minimum scale value ... ; -5D~-25D; +5D~+25D:0.25DAstigmatism axis angle of cylindrical lens: 0~180°Minimum scale value ... 0.01D, 0.06D, 0.12D, 0.25DAstigmatism Axis Angle of Cylindrical Lens: 0~ 180°, space of readings ...