A certain eyeglass lens is thin at its centre, even thinner at its top and bottom edges, and relatively thick at its left and right edges. What defects of vision is this lens intended to correct?

I)Hypermetropia for objects oriented both vertically and horizontally

II)Myopia for objects oriented both          vertically and horizontally 

III)Hypermetropia for objects oriented    vertically and myopia for objects              oriented horizontally 

(IV)Hypermetropia for objects oriented horizontally and myopia for objects        oriented vertically horizontally