This article presents my reminiscences of the work in Chicago on the
correction or reduction of lens aberrations. Studies began in the early
1960s and extended over a period of almost 40 years, although it was
never the primary focus of the work of the laboratory. The account is
almost entirely based on my own memory, which is not a very reliable
instrument. It is not intended to be a review and is more accurately
describable as a personal recollection.