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.
Furthermore, this article comparing human and cephalopod eyes might be of interest: QuarkPhysics