The human retina renews its nearly l08photoreceptor cell outer segments approximately every 10 days. No other postmitotic cell demonstrates such proclivity for rejuvenation, and at such considerable expense to the host. The plausible justifications of this activity are considered within the chapters of this book, written by attendees of the Proceedings of the Neuroscience Program Symposium on Photostasis and Related Topics, conducted February 21-23, 1997, in Tallahassee, Fla.
Polans AS. Photostasis and Related Phenomena. Arch Ophthalmol. 1999;117(2):289. doi: