The human eye is roughly the size of a ping-pong ball and consists of several important parts, each with a specific function:

1. Cornea

The transparent, dome-shaped front layer that bends (refracts) light to help focus it onto the retina.

2. Pupil

The dark circular opening in the center of the iris. It changes size to control the amount of light entering the eye.

3. Iris

The colored part of your eye (blue, green, brown, etc.), which controls the size of the pupil.

4. Lens

Located behind the iris, the lens further focuses light onto the retina. It changes shape to focus on near or far objects (a process called accommodation).

5. Retina

A thin layer of tissue at the back of the eye that contains photoreceptor cells—rods and cones—which detect light and color.

6. Optic Nerve

The “messenger” that carries visual information from the retina to the brain, where the image is processed.

 How Does the Eye Work?

Here's a simplified breakdown:

1. Light enters through the cornea.

2. It passes through the pupil, which adjusts depending on light intensity.

3. The lens focuses the light onto the retina.

4. The retina converts light into electrical signals.

5. These signals are sent via the optic nerve to the brain.

6. The brain interprets these signals as images.

So what you "see" is actually your brain's interpretation of light and color!

Common Eye Conditions

• Myopia (Nearsightedness): Can see nearby objects clearly, but distant objects appear blurry.

• Hyperopia (Farsightedness): Distant objects are clear, but close ones are blurry.

• Astigmatism: Irregular curvature of the cornea or lens, causing blurry vision.

• Cataracts: Clouding of the lens, common in older adults.