PRL and retinal degeneration: The role of amino-acid derived hormones (melatonin, dopamine, thyroxine)1–3, steroidal hormones (estrogen, progesterone, aldosterone, corticosteroids)4–6 and protein/peptide hormones (growth hormone, somatostatin, prolactin, aldosterone)7–9 in normal retinal homeostasis and retinal degeneration has been investigated extensively over the past decades.