What is the primary function of the human eye?

• To detect light and enable vision.

• To provide color to the environment.

• To produce tears for emotional expression.

• To regulate body temperature.

How many colors can the human eye distinguish?

• 10 million

• 1 million

• 100 thousand

• 5 thousand

What part of the eye is responsible for focusing light?

What is the role of the retina in vision?

• The retina focuses light onto the lens.

• The retina regulates the amount of light entering the eye.

• The retina stores visual memories for later use.

• The retina converts light into electrical signals for vision.

What are the three types of cones in the human eye?

• X-cones, Y-cones, Z-cones

• R-cones, G-cones, B-cones

• A-cones, B-cones, C-cones

• S-cones, M-cones, L-cones

How does the eye perceive color?

• The eye perceives color through cones that detect different wavelengths of light.

• The eye perceives color by filtering out all wavelengths except red.

• Color is perceived by the brain without any input from the eyes.

• The eye perceives color through rods that detect brightness.

What is color blindness and how does it occur?

• Color blindness is a visual impairment that affects the ability to perceive colors accurately, often due to genetic mutations affecting the cones in the retina.

• Color blindness is a type of eye disease that leads to vision loss.

• Color blindness is a condition that makes people see in black and white.

• Color blindness is caused by excessive exposure to bright light.

What is the difference between rods and cones in the eye?

• Rods detect color and function best in low light, while cones are for low-light vision.

• Rods and cones both detect color but have different sensitivity to light levels.

• Rods are responsible for sharp vision and cones for peripheral vision.

• Rods are for low-light vision and do not detect color, while cones are for color vision and function best in bright light.

How does light enter the eye?

• Light is absorbed directly by the retina without passing through any structures.

• Light enters the eye through the sclera and iris.

• Light enters the eye through the cornea, pupil, and lens to reach the retina.

• Light enters the eye only through the lens and bypasses the cornea.

What is the significance of the fovea in vision?

• The fovea is responsible for peripheral vision.

• The fovea helps in detecting motion in the visual field.

• The fovea is primarily involved in color perception.

• The fovea is significant for providing sharp central vision and high visual acuity.