The risk/benefit of genetic engineering to enhance the spectral resolution of the eye wouldn't seem to be justified for the case of elective "vanity" procedures

The risk/benefit of genetic engineering to enhance the spectral resolution of the eye wouldn't seem to be justified for the case of elective "vanity" procedures. Also, at least by some sources I found, the identified tetrachromats have an additional cone with sensitivity between red and green, not in blue. Are you conflating tetrachromacy from additional comes with tetrachromacy arising from aphakia (loss of the UV-absorbing lens)?