Greg Schwartz is accustomed to spending 10 hours a day in the dark.
The assistant professor of ophthalmology at Northwestern University regularly glues mouse retinas onto a glass slide and spends an absorbing day shining different patterns of light into it to measure how the eye fragment responds.
He’s trying to classify every single type of a class of cells in the retina, which is the lining inside the eye that absorbs light and sends signals to the brain.
