Intrinsically photosensitive retinal ganglion cells (ipRGCs) are involved in circadian and other non-image forming visual responses. An open question is whether the activity of these neurons may also be under the regulation mediated by the neurohormone melatonin. In the present work. by double-staining immunohistochemical technique. https://www.roneverhart.com/Secret-Hidden-Flask-in-a-Bible/