Mini-rant up front. Cybernetic senses are ridiculously expensive. I can appreciate that there was probably an intent to prevent decently wealthy characters like nobleborns and clerics from getting easy access to Good quality or best quality cybernetic senses easily, but for characters with more moderate incomes, it seems like losing an eye means you're going the rest of the campaign without it, as buying a replacement would be near impossible, unless you go for a poor quality replacement
Which brings me to the point of this thread.
Having a character who's recently lost an eye I was checking in on the idea of getting a poor quality bionic replacement and... Is it just me or are poor quality bionic senses literally no better than not having that sense at all?
As far as I can see, losing an eye permanently reduces Ballistic skill by ten (at least until you get the eye back) and you take a -20 on all sight based tests.
A poor quality cybernetic eye notes that you also take a -20 on all sight based tests.
Is it intended for there to functionally be no real difference between having a poor quality bionic eye and no bionic eye at all?