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Lilense tsa Optical tse sehiloeng ka pono e le 'ngoe tse 1.56 tse sehiloeng ka 'mala o moputsoa
Hangata, ho na le mefuta e tšeletseng ea index ea refractive ea lilense tsa resin: 1.50, 1.56, 1.60, 1.67, 1.71 le 1.74. Haeba u batla index e phahameng ea refractive, u ka nahana feela ka lilense tsa khalase, tse nang le 1.80 le 1.90 tseo u ka khethang ho tsona. Ke feela hore lilense tsa khalase ha li sebelisoe hangata matsatsing ana, leha maqephe a khalase a boetse a na le index e tlase ea refractive, joalo ka 1.60 le 1.71.
