Lub lens aspheric lossis asphere (feem ntau sau npe ASPH ntawm qhov muag daim) yog lub lens uas nws qhov profile tsis yog ib feem ntawm lub kheej kheej lossis lub tog raj kheej.Lub asphere qhov nyuaj ntawm qhov profile tuaj yeem txo lossis tshem tawm cov duab sib txawv thiab tseem txo qis lwm yam kev hloov kho qhov muag xws li astigmatism, piv rau lub lens yooj yim.Ib lub lens aspheric feem ntau tuaj yeem hloov pauv ntau txoj kev siv ntau lub lens.Cov cuab yeej tshwm sim yog me dua thiab sib dua, thiab qee zaum pheej yig dua li ntau lub lens tsim.Cov ntsiab lus aspheric yog siv rau hauv kev tsim ntawm ntau lub ntsiab lus dav-lub kaum ntse ntse thiab ceev ceev ib txwm lo ntsiab muag kom txo qis aberrations.Lawv kuj tau siv ua ke nrog cov ntsiab lus cuam tshuam (catadioptric systems) xws li aspherical Schmidt corrector phaj siv hauv Schmidt koob yees duab thiab Schmidt-Cassegrain telescopes.Me me moulded aspheres feem ntau yog siv rau collimating diode lasers.Aspheric lo ntsiab muag kuj qee zaum siv rau tsom iav.Aspheric eyeglass lo ntsiab muag tso cai rau lub zeem muag zoo dua li cov qauv "zoo tshaj plaws" lo ntsiab muag, feem ntau thaum saib lwm cov lus qhia dua li qhov chaw kho qhov muag.Tsis tas li ntawd, qhov txo qis ntawm qhov kev nthuav dav ntawm lub lens tuaj yeem pab nrog cov tshuaj uas muaj lub zog sib txawv hauv 2 lub qhov muag (anisometropia).Tsis hais txog qhov zoo ntawm qhov muag, lawv yuav muab lub lens thinner, thiab tseem cuam tshuam tus neeg saib lub qhov muag tsawg dua li pom los ntawm lwm tus neeg, ua kom zoo nkauj zoo nkauj.
2.Spherical vs aspherical lo ntsiab muag

Aspherical spectacle lo ntsiab muag siv ntau qhov nkhaus hla lawv qhov chaw los txo cov khoom loj thiab ua rau lawv flatter hauv lawv qhov profile.Spherical lo ntsiab muag siv cov lus nkhaus hauv lawv qhov profile, ua rau lawv yooj yim dua tab sis bulkier, tshwj xeeb tshaj yog nyob rau hauv nruab nrab ntawm lub lens.
3.Aspheric Advantage
Tej zaum qhov tseem ceeb tshaj plaws ntawm kev pom asphericity yog qhov pom ntawm aspheric lo ntsiab muag yog ze rau lub zeem muag ntuj.Aspheric tsim tso cai rau flatter puag nkhaus siv yam tsis muaj kev cuam tshuam kev ua haujlwm kho qhov muag.Qhov sib txawv ntawm lub ntsej muag kheej kheej thiab lub ntsej muag aspheric yog lub ntsej muag kheej kheej muaj ib qho curvature thiab zoo li lub pob tawb.Ib qho aspheric lens curves maj mam, zoo li football hauv qab no.Lub lens aspheric txo qhov kev nthuav dav kom ua rau lub ntsej muag zoo dua qub thiab txo qhov chaw tuab siv cov khoom siv tsawg, ua rau muaj qhov hnyav dua.