1 5 Social Studies Writing Prompts Social studies can be a very fun subject if given the opportunity. 2  There are plenty of homework options that both bring the subject to life and allow for student creativity.
The cornea helps the eye focus as light makes its way through. It is a very important part of the eye, but you can hardly see it because it's made of clear tissue. Like clear glass, the cornea gives your eye a clear window to view the world through.
For reference, the radius of the first minimum for a diffraction pattern formed on the retina is about 4.6 micrometers with 550-nanometer light and a pupil diameter of 2 millimeters. Thus, the arrangement of sensory elements in the retina will determine the limiting resolution of the eye.