Iperi yeelensi ezilungele wena kufuneka ziqwalaselwe ngokubanzi ngokudityaniswa nesidanga sethu, umgama womfundi, imilo yesakhelo, uhlahlo lwabiwo-mali, imeko yokusetyenziswa kunye nezinye izinto.
Isalathisi se-refractive sifana nobukhulu besihlangu. Kungakhathaliseki ukuba yiyiphi i-brand, ezi ziiparameters eziqhelekileyo, ezinokuqondwa ngokubanzi njengobunzima be-lens. Ukuphakama kwesalathisi se-refractive, i-lens encinci. I-500 degree myopia efanayo, i-lens ye-1.61 yi-1.56 encinci.
Nangona i-index ye-refractive ephezulu iphezulu, iyancipha ngakumbi. Ngokuqhelekileyo, okukhona isalathisi se-refractive siphezulu, kokukhona lisezantsi inani le-Abbe. Khetha isidanga esifanelekileyo kuwe
Izalathisi zerefractive ezahlukeneyo zineenombolo ezahlukeneyo ze-Abbe. Oku kulandelayo ngamanani e-Abbe ahambelana nezalathisi ze-refractive ezahlukeneyo:
1.50
UAbbe inombolo 58
Inani eliphezulu kakhulu le-Abbe lisondele kumava abonakalayo weliso lenyama. Ilensi engqukuva iya kuba ngqindilili kakhulu ukuba idigri iphezulu. Ilungele kuphela i-myopia yeqondo eliphantsi ngaphakathi kwama-250 degrees. Igophe elisisiseko likhulu, kwaye ayifanelekanga kwiiglasi zefreyimu enkulu.
1.56
Inombolo Abbe 35-41
Inombolo ye-Abbe imodareyitha, i-1.56 yi-index ye-refractive ephantsi kakhulu ye-lens brands, engabizi kwaye ifanelekile kwi-myopia ngaphakathi kwe-300 degrees; Akukhuthazwa ukuba ubushushu budlula i-350 degrees. Ilensi iya kuba ngqindilili xa isidanga siphezulu.
1.60
Inombolo Abbe 33-40
I-1.60 kunye ne-1.61 yimikhwa eyahlukeneyo yokubhala kunye nesalathisi esifanayo se-refractive. Akukho mahluko. Ngokutsho kweempawu ezahlukeneyo kunye nochungechunge, inani le-Abbe lihluka ukusuka kwi-33-40. Ngokomzekelo, ukukhuselwa kwemitha yenyanga ekhanyayo 1.60 yi-33 dB, kunye nochungechunge lwe-PMC lwenyanga eqaqambileyo yi-40 dB.
1.67
UAbbe inombolo 32
Inombolo ye-Abbe ephantsi, ukusabalalisa okukhulu kunye nesiphumo sokucinga ngokubanzi. Kuluhlu lwe-550-800 degree myopia, i-1.61 inzima kakhulu, uhlahlo lwabiwo-mali lulinganiselwe, kwaye alukho ngaphezu kwe-1.71, ngoko ke i-1.67 lukhetho lokulungelelanisa.
1.71
UAbbe inombolo 37
Ngokuqhelekileyo, i-index ye-refractive ye-lens iphezulu, iyancipha inani le-Abbe kunye nokusasazeka okukhulu. Nangona kunjalo, ngokuphumelela kobuchwepheshe be-lens, lo mgaqo uyaphulwa. Umzekelo, i-1.71 incinci kune-1.67, kwaye inombolo ye-Abbe iphezulu.
1.74
UAbbe inombolo 33
Eyona index refractive kunye nenombolo Abbe lens resin liphantsi, kwaye ixabiso liphezulu. Nangona kunjalo, kwi-myopia ephakamileyo, akukho ndlela enye. Emva kwayo yonke loo nto, ubukhulu buhlala buwona mava anamava. Ngaphezulu kwe-800 degrees kunokuqwalaselwa, kwaye ngaphezu kwe-1000 degrees kunokuqwalaselwa ngaphandle kokucinga nantoni na enye. Tshatisa nje i-1.74.
Ixesha lokuposa: Mar-09-2023