- Location: The eyes of dolphins are located on the sides of their heads, giving them a wide field of vision, allowing them to see in almost every direction except directly behind them.
- Shape: Dolphin eyes are round, with a large cornea that covers the front part of the eye and helps focus light.
- Sclera: The white part of the dolphin's eye is called the sclera, and it is thicker than in human eyes.
- Lens: The lens of a dolphin's eye is spherical and can change shape more quickly than the human lens, allowing them to focus on objects at different distances more rapidly.
- Tapetum Lucidum: Dolphins have a layer of tissue behind their retina called the tapetum lucidum, which reflects light back into the eye, increasing their sensitivity to light and helping them see in low-light conditions.
- Accommodation: Dolphins can accommodate (focus) their vision rapidly, allowing them to switch focus from objects that are very close to those that are far away within milliseconds.
- Retina: The retina of a dolphin's eye contains millions of light-sensitive cells called photoreceptors, which are responsible for detecting light and transmitting visual information to the brain. Dolphins have a higher concentration of photoreceptors than humans, which gives them sharper vision.
Human Eye
- Location: The human eyes are located at the front of the head, providing forward-facing binocular vision.
- Shape: The human eyes are approximately spherical and have a clear, protective layer called the cornea on the front surface.
- Sclera: The white portion of the human eye is also known as the sclera, and it is tough and fibrous, providing support and protection for the eye's internal structures.
- Lens: The human eye has a flexible lens that changes shape to focus light onto the retina. This allows us to focus on objects at different distances.
- Tapetum Lucidum: Humans do not have a tapetum lucidum.
- Accommodation: Like dolphins, humans can accommodate (focus) their vision to objects at varying distances, but the speed of accommodation decreases with age.
- Retina: The retina in humans contains specialized photoreceptor cells, including cones for color vision and rods for low-light vision.