ʻO ka helu hoʻohālikelike o ka lens, 1.49, 1.56, 1.60, 1.67, 1.71, 1.74 ma ka hōʻailona luna o ka lens e pili ana i ka helu refractive o ka lens. No nā aniani myopic, ʻoi aku ka kiʻekiʻe o ka helu refractive o ka lens, ʻoi aku ka lahilahi o ka lihi o ka lens, ma ka manaʻo ua like nā ʻāpana ʻē aʻe.