Lens pụtara dị ka ndenye ọgwụ na ụlọ nyocha oghere ka a na-akpọ oghere Rx.Na tiori, ọ nwere ike ịbụ ihe ziri ezi ruo 1°.Ka ọ dị ugbu a, ọtụtụ n'ime oghere Rx na-enye iwu site na ogo ike gradient nke 25. N'ezie, a na-ahazi paramita dị ka anya ụmụ akwụkwọ, asphericity, astigmatism na ọnọdụ axial iji nweta nsonaazụ kacha mma (ọ bụghị naanị oke edo edo).Ọgụgụ anya anya m na-agụ, n'ihi nnabata nke anya nke ụmụ akwụkwọ, ogo gradient bụ 50, mana enwerekwa 25.
Tags:oghere Rx, oghere ndenye ọgwụ, oghere ahaziri ahazi