ea Mechini ea Majoe ea China
Lilense tsa "aspherical spectacle" li sebelisa li-curve tse fapaneng ho potoloha bokaholimo ba tsona ho fokotsa bongata le ho li etsa hore li be sephara maemong a tsona.Lilense tsa spherical li sebelisa lekhalo le le leng profilong ea tsona, li etsa hore li be bonolo empa li le ngata haholo, haholo bohareng ba lense.
Mohlomong truism e matla ka ho fetisisa mabapi le asphericity ke hore pono ka lilense tsa aspheric e haufi le pono ea tlhaho.Moralo oa aspheric o lumella li-curve tse bataletseng hore li sebelisoe ntle le ho senya ts'ebetso ea optical.Phapang ea mantlha lipakeng tsa lense e chitja le ea aspheric ke hore lense e chitja e na le kobeho e le 'ngoe 'me e bōpehile joalo ka basketball.Lense ea aspheric e kobeha butle-butle, joalo ka bolo ea maoto e ka tlase.Lense ea aspheric e fokotsa ho holisa ho etsa hore ponahalo e be ea tlhaho le botenya bo fokotsehileng ba bohareng bo sebelisa thepa e fokolang, e bakang boima bo fokolang.
Ho ea ka litlhoko tsa hau tsa 'nete, khetha mekhoa e metle ka ho fetesisa ea moralo le moralo