 Ọ bụrụna nwa gị anaghị eme nkeọma nụlọ akwụkwọ, biko kpọrọ ya gaa na ezigbo ụlọ ọgwụ anya ka dọkịnta anya nyuochaa ya anya maka nsogbu anya ndi bekee nakpọ refractive error nwere ike ime ụmụaka nagba ọnyụ paa nụlọ akwụkwọ. 