Ezinye zezinto eziphambili ekulindeleke ukuba ziqhube imakethi yelensi zoqhagamshelwano ziquka ukwanda kwezifo zamehlo ezinje nge-myopia, i-presbyopia, kunye ne-astigmatism, kunye nendlela yokuphila yokuhlala, ukonyuka kwesiseko sabantu abalupheleyo, ukuba sengozini ye-presbyopia, kunye nomdla womsebenzisi wokugqibela we-presbyopia.Izazi...
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