ʻO ka maʻamau, ke kamaʻilio mākou i ka index o ka resin lens, mai 1.49 - 1.56 - 1.61 - 1.67 - 1.71 - 1.74. No laila ka mana like, ʻo 1.74 ka lahilahi, ʻoi aku ka kiʻekiʻe o ka mana, ʻoi aku ka maopopo o ka hopena.