[填空题]
A person has a far pointkinq 6phad; c(uv178h of 14uh2fs5(i vn-8 b )6utzh +kjkvewxs,: $cm$. What power glasses would correct this vision if the glasses were placed 2.0 $cm$ from the eye? What power contact lenses, placed on the eye, would the person need?
