Lense e tsoelang pele ke lense e bolelele ba lintho tse ngata, e fapaneng le likhalase tsa khale tsa ho bala le likhalase tsa ho bala tse peli. Lilense tse tsoelang pele ha li na mokhathala oa li-eyeballs tse lokelang ho lula li fetola bolelele ba tsepamiso ha li sebelisa bolelele ba bifocal, 'me ha ho na moeli o totobetseng pakeng tsa bolelele ba tse peli tse tsepamisitsoeng. moeli oa moeli. Hoa phutholoha ho apara 'me ho na le ponahalo e ntle,' me butle-butle e fetohile khetho e ntle ka ho fetisisa bakeng sa batho ba nang le presbyopia.