Adding to the answer above, another advantage of cephalopod eyes is the lower risk of retina detachment. (HumanEvolution)
Also, cephalopod eye focus image by moving the lense (like a camera or telescope), not by changing the lense's curvature, as in vertebrate eye (Wiki). Hence, I speculate that cephalopod would not experience either myopia or hyperopia. Cephalopod may still have problem with presbyopia at old age, affecting both near and far vision, however.