If it helps the loved ones of murder victims sleep at night, then I'm for it. If not, then I'm against it. They are the ones whose opinion(s) should hold the most weight.
People can take someone's eye more than once. An eye for an eye ongoing would eventually grab both eyes. So the quote does make sense as long as it carried out in full.
it may be a better punishment to incarcerate for life. Maybe we should let this be an election for the people who have a life without parole sentence?