Eyesight, also known as vision, is a crucial sense that allows us to perceive the world around us. It involves a complex process that begins with light entering the eye and being focused onto the retina. Here's a breakdown of the key components:

Anatomy of the Eye

The eye is a remarkable organ composed of several parts:

• Cornea: Transparent outer layer that refracts light.
• Pupil: Adjustable opening that controls light entry.
• Lens: Focuses light onto the retina.
• Retina: Light-sensitive tissue at the back of the eye.
• Optic Nerve: Transmits visual information to the brain.

How Vision Works

Vision is a process involving:

• Light Refraction: Light bends as it passes through the cornea and lens.
• Retinal Image Formation: Light forms an inverted image on the retina.
• Neural Transmission: Photoreceptor cells (rods and cones) convert light into electrical signals.