01 ʻIke ʻia ke ana ʻana o ka pupillary mamao, ʻike ʻia ʻo ka mea ana PD, i kāna noi ma nā ʻano hiʻohiʻona like ʻole i loko o ka ʻoihana optical. He mea nui kēia mea paahana pololei no ka poʻe optician, ophthalmologists, optometrists, a me nā ʻoihana mālama maka ʻē aʻe, no ka mea hiki iā lākou ke ana pololei i ka mamao ma waena o nā kikowaena o nā haumāna o ke kanaka.
Ma nā hale kūʻai optical, he kuleana koʻikoʻi ka mea ana PD i ka hōʻoia ʻana e loaʻa i nā mea kūʻai aku nā aniani kūpono a i ʻole nā lens pili. Ma ka lawe pololei ʻana i nā ana ʻana o ka pupillary, hiki i ka poʻe optician ke hōʻoia i ka hui pono ʻana o nā kikowaena optical o nā lens me nā haumāna o ka mea kūʻai aku, e hāʻawi ana i ka hōʻoluʻolu ʻike maikaʻi a me ka maopopo. He mea nui kēia no ka pale ʻana i ka ʻike maka, ke ʻano o ka maka, a i ʻole nā pilikia ʻē aʻe e kū mai ana mai nā makaaniani kūpono ʻole.