What is the difference between cornea and iris

Ambati: Indeed. The eye works because you have all of these intricate structures working together. The eyelids provide a windshield wiper as well as producing tears, which lubricate the cornea and keep it smooth. Announcer: thescoperadio.

If you like what you heard, be sure to get our latest content by following us on Facebook. Just click on the Facebook icon at thescoperadio. Subscribe to Our e-Newsletter. Find a doctor or location close to you so you can get the health care you need, when you need it. Miller: The back of the eye. Miller: That hasn't happened for a while, but I like the idea of it. Ambati: And then behind that.

You are here Home Your eye health Anatomy of the eye. Anatomy of the eye Our eyes might be small, but they provide us with what many people consider to be the most important of our senses — vision. Anatomy of the eye. The cornea directs light rays into the eye and helps focus them on the light-sensitive retina at the back of the eye, providing sharp, clear vision. The lens is located behind the iris and is normally clear. Light passes through the pupil to the lens.

Small muscles attached to the lens can make the lens change shape, allowing the eyes to focus on near or far objects. Author: Healthwise Staff. The eye has three main layers. These layers lie flat against each other and form the eyeball. The outer layer of the eyeball is a tough, white, opaque membrane called the sclera the white of the eye.

The slight bulge in the sclera at the front of the eye is a clear, thin, dome-shaped tissue called the cornea. The middle layer is the choroid. The front of the choroid is the colored part of the eye called the iris. In the center of the iris is a circular hole or opening called the pupil.

The inner layer is the retina , which lines the back two-thirds of the eyeball. The retina consists of two layers: the sensory retina, which contains nerve cells that process visual information and send it to the brain; and the retinal pigment epithelium RPE , which lies between the sensory retina and the wall of the eye.

The inside of the eye is divided into three sections called chambers. Anterior chamber: The anterior chamber is the front part of the eye between the cornea and the iris. The iris controls the amount of light that enters the eye by opening and closing the pupil. The iris uses muscles to change the size of the pupil.