Jackson Cross Cylinder
Jackson Cross Cylinder is used to determine orientation of astigmatism correction, the power of the astigmatism correction and the axis. Lenses are 35mm with axis markings and handles are 70mm long.
Jackson Cross Cylinder is used to determine orientation of astigmatism correction, the power of the astigmatism correction and the axis. Lenses are 35mm with axis markings and handles are 70mm long.