Because you are bored one afternoon, you decide to try a little experiment. You open your eye very wide, extend your thumb, and then poke yourself in the e ure. Aside from being very foolish and in alot of pain, you may learn something about your eye when you engage in this masochistic behavior. The very first thing your thumb touch would as it made contact with your eye would be
A. Cornea
B. Retina
C. Lens
D. Iris
My answer B.
No. Take a look at this diagram and see if you can figure it out.
http://www.bing.com/images/search?q=the+eyeball&id=7BC020F9C967E575EA0190C734F628B56D0CE883&FORM=IQFRBA
Cornea is the first contact
To determine which part of the eye your thumb would touch first, you can visualize the structure of the eye. The human eye consists of several components, including the cornea, retina, lens, and iris.
The cornea is the transparent, outermost layer of the eye. It acts as a protective barrier and helps to focus light onto the retina.
The retina is located at the back of the eye and contains light-sensitive cells called photoreceptors. It converts the light signals into electrical impulses that are sent to the brain for visual processing.
The lens is a flexible structure situated behind the iris and focuses light onto the retina by changing its shape.
The iris is the colored part of the eye, located in front of the lens. It controls the size of the pupil, which regulates the amount of light entering the eye.
If you were to poke yourself in the eye, the very first thing your thumb would touch would be the cornea. The cornea is the outermost layer and is easily accessible.
Therefore, the correct answer would be A. Cornea.