"Dilate means to make larger, so pupils do the opposite to sharpen vision.
Remember the optometrist dilates the pupils to be able to look inside the
eye. But pupils dilate when you see something of interest which increases
the amount of light at the same time the sharpness is decreased."
Is "sharpness" here equated with angular resolution? If so, wouldn't a larger pupil/aperture result in better resolution?
Mike Meyer
Lecturer/Lab Coordinator
Michigan Tech University
mrmeyer@mtu.edu