Michael Behe in 2006 and Jonathan Wells in 2017 wrote about the irreducible complexity of the light-sensing cascade that makes vision possible.
It can detect a single photon. It can test the foundations of our understanding of nature. And it is also a piece of “botched” work by evolution?
True, things go wrong with our bodies, with results that range from the tragic to the merely expensive or inconvenient.
“The human eye is a well-tread [sic] example of how evolution can produce a clunky design,” writes Professor Lents.
In a physical world there will be design constraints, so it is only realistic to expect tradeoffs.