Optical performance requirements of trial case lenses

Tolerance of cylindrical degree of spherical lens; Tolerable error of prism degree,

spherical degree and cylindrical degree of prism lens;

The division and tolerance of the prism power at the geometric center of the spherical

lens and the cylindrical lens; the division and tolerance of the cylindrical lens axis; the

division and tolerance of the baseline of the prism sheet; the technical requirements

of the cross-cylindrical lens, etc. Stipulate