01 Ibanga le-pupillary (PD) kanye nethuluzi lokulinganisa ubude be-pupillary (PH), eliqukethe iphoyinti lokuphambana komfundi lokuqondanisa okunembile, idizayini yesikali sobude be-pupillary, kanye nedizayini ye-clip groove edonsayo, ithola ukusetshenziswa kwayo ezimeni ezahlukahlukene ezihlobene nokulingana kwezingubo zamehlo nokulungiswa kokubona.
Ezitolo ezidayisa izinto ezibonakalayo, leli thuluzi libalulekile ekuqinisekiseni ukuthi amakhasimende athola izibuko noma abathintwayo abahlangabezana kahle nezidingo zabo zobuso nezibonwayo. Iphoyinti lokuphambana kwe-pupil livumela ukuqondanisa okunembe ngokwedlulele kwethuluzi ngamehlo ekhasimende, iqinisekisa ukuthi amanani e-PD ne-PH anembile. Lokhu kubalulekile eku-odeni izibuko ezilingana ngokwezifiso noma abathintwayo abanikeza ukulungisa nokunethezeka kombono okuphelele.