The virtual assistant in iOS can do all kinds of stuff, of course. But here are the 16 things we think everyone should try at least once.
In most vertebrates and some molluscs, the eye works by allowing light to enter and project onto a light-sensitive panel of cells, known as the retina, at the rear of the eye. The cone cells (for colour) and the rod cells (for low-light contrasts) in the retina detect and convert light into neural signals for vision.
âBut they are mostly absorbed locally.â Almost all of the biophotons you see are the ones both emitted and absorbed by atoms in the retina â the part of your eye responsible for detecting light. Inside the retina, millions of tiny cells called rods and cones collect light and convert it into electrical signals.