Robot eyesight is more or less as good as human eyesight. A fundamental restriction that the people making machines don't want to fuck with too hard is that robot brains and human brains are alike in their capabilities, and they're very cautious about playing with it. So Dora doesn't, for example, have the ability to zoom in. Similar for her other senses, they're great but inside human norms. There's some drawbacks too: like all machines her sense of touch has 'gaps' at joints, for instance.
This is why you don't tend to have machines with multiple extra limbs, multiple vision modes, etc. They *can* build them, but they're careful about what extra capabilities they give machines as a whole, so those things are usually one-offs, ways that robots customize themselves. Back when she was working as a seamstress, Beatrice would sometimes rock an extra set of arms to make it easier to work with complex patterns, but they were weird and disorienting and she eventually decided to go back once she started writing. Dora does have a few 'weird functions' outside of the human bodyplan: she's got a fold out multitool in her right thumb joint and peripheral motion sensors that manifest as motion in the corner of her vision, which makes her really hard to sneak up on. But her vision is merely good by human standards.
That said... human eyesight in the setting is *generally* improved over the real thing. Through gene-editing, there's a slow movement toward human improvement, but emphasis on slow: it's more like vaccines than people just willy-nilly messing with their genetics, and they try to have galaxy-wide approval before pushing anything because a long-term worry of the machines is the creation of divergent human species with their own clades of machines and accidently balkanizing human space. There's some small-scale aesthetic changes, though, which is why people in the setting have weird hair and eye colours. The Polaris familiar changed their hair colour to a steel blue to match the star they claimed, and Ensign Kelly has purple hair, just haven't had cause to bring it up (the doom of writing something that's supposed to be normalized in-setting).
For the big stuff, some of it is CRISPER-style editing for health reasons (usually doing stuff like making the immune system more robust and so forth), while others improve outcomes for the next generation: unlike her parents, Miss Polestar's eyes don't have blind spots because the optic nerve has been redesigned, and compared to us your average human in the setting has 20/10 vision.
That said, it's not perfect: Miss Polestar still needs glasses.
