Ipheya lamalensi alungele wena kufanele licatshangelwe ngokugcwele lihlanganiswe neziqu zethu, ibanga lomfundi, ukuma kohlaka, isabelomali, isimo sokusebenzisa nezinye izici.
Inkomba ye-refractive ifana nosayizi wezicathulo. Kungakhathaliseki ukuthi yiluphi uhlobo lomkhiqizo, lezi yimingcele evamile, engaqondwa kakhulu njengobukhulu be-lens. Uma iphezulu inkomba ye-refractive, i-lens iba mncane. I-myopia engu-500 degree efanayo, ilensi engu-1.61 ingu-1.56 izacile.
Noma iphezulu inkomba ye-refractive, iba mncane kakhulu. Ngokuvamile, ukuphakama kwenkomba ye-refractive, inombolo ye-Abbe iphansi. Zikhethele iziqu ezifanele
Izinkomba ze-refractive ezihlukene zinezinombolo ze-Abbe ezihlukene. Okulandelayo izinombolo ze-Abbe ezihambisana nezinkomba ezihlukile zokuphinda zibukeke:
1.50
Abe inombolo 58
Inombolo ye-Abbe ephezulu kakhulu iseduze nesipiliyoni esibonakalayo seso lenyama. Ilensi eyindilinga izoba wugqinsi kakhulu uma idigri iphezulu. Ilungele kuphela i-myopia enezinga eliphansi ngaphakathi kwama-degree angu-250. Ijika eliyisisekelo likhulu, futhi alizifanele izibuko zohlaka olukhulu.
1.56
Inombolo ye-Abbe 35-41
Inombolo ye-Abbe iphakathi, i-1.56 iyinkomba ephansi ye-refractive yezinhlobo eziningi zamalensi, eshibhile futhi ifanele i-myopia ngaphakathi kwamadigri angu-300; Akunconywa uma izinga lokushisa lidlula ama-degree angu-350. Ilensi izoba mkhulu uma idigri iphakeme.
1.60
Inombolo ye-Abbe 33-40
U-1.60 kanye no-1.61 yimikhuba ehlukene yokubhala enenkomba efanayo yokuphinda iphendule. Awukho umehluko. Ngokusho kwemikhiqizo ehlukene nochungechunge, inani le-Abbe liyahlukahluka kusuka ku-33-40. Isibonelo, ukuvikelwa kwemisebe yenyanga ekhanyayo engu-1.60 yi-33 dB, futhi uchungechunge lwe-PMC lwenyanga ekhanyayo luyi-40 dB.
1.67
U-Abbe inombolo 32
Inombolo ye-Abbe ephansi, ukuhlakazeka okukhulu kanye nomthelela ojwayelekile wokucabanga. Ebangeni le-550-800 degree myopia, i-1.61 iminyene kakhulu, isabelomali sinomkhawulo, futhi asingaphezu kuka-1.71, ngakho-ke i-1.67 iyisinqumo sokuyekethisa.
1.71
U-Abbe inombolo 37
Ngokuvamile, ukuphakama kwenkomba ye-refractive yelensi, iyancipha inombolo ye-Abbe kanye nokuhlakazeka okukhulu. Kodwa-ke, ngokuphumelela kobuchwepheshe be-lens, lo mthetho uyaphulwa. Isibonelo, u-1.71 mncane kuno-1.67, futhi inombolo ye-Abbe iphakeme.
1.74
U-Abbe inombolo 33
Inkomba ye-refractive kakhulu kanye nenombolo ye-Abbe yelensi ye-resin iphansi, futhi intengo iphakeme kakhulu. Kodwa-ke, nge-myopia ephezulu, akukho okunye ukukhetha. Phela, ukujiya kuhlale kuwukuhlangenwe nakho okunembile kakhulu. Ngaphezulu kwama-degree angu-800 kungacatshangelwa, futhi ngaphezu kwama-degree angu-1000 angabhekwa ngaphandle kokucabanga nganoma yini enye. Qhathanisa nje i-1.74.
Isikhathi sokuthumela: Mar-09-2023