Nov. 14, 2011 -- Mini strokes, with symptoms that last just a few minutes or hours, are well-recognized warning signs for potentially deadly larger strokes. Now new research confirms that they are associated with a lower life expectancy.
A cross section is the shape we get when cutting straight through an object. The cross section of this object is a triangle. It is like a view into the inside of something made by cutting through it.
The Eye in Cross Section. When we look at a cross section of the eye, we can see the interior structures of the eye. The transparent portion at the very front of the eye is called the cornea. The cornea is a thin layer of cells that allows light to pass through the front of the eye. The lens of the eye sits behind the iris. The lens focuses the light that comes through the cornea onto the back of the eye.