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1.59 PC Bifocal Invisible Photochromic Grey HMC Optical Lenses
Ugbu a, e nwere ụdị ihe abụọ e ji ele anya n'ahịa, otu bụ ihe e ji iko mee, nke ọzọ bụ ihe e ji resin mee. A na-ekewa ihe e ji resin mee n'ime CR-39 na polycarbonate (ihe e ji PC mee).
Lenzi Bifocal ma ọ bụ lenzi Bifocal bụ lenzi nwere ebe mgbazi abụọ n'otu oge ma a na-ejikarị ha agbazi presbyopia. A na-akpọ ebe dị anya nke lenzi bifocal na-agbazi mpaghara dị anya, a na-akpọkwa mpaghara dị nso na mpaghara ọgụgụ. Ọtụtụ mgbe, mpaghara dị anya buru ibu, ya mere a na-akpọkwa ya ihe nkiri bụ isi, mpaghara proximal dịkwa obere, ya mere a na-akpọ ya sub-film.
