Human Eye Quiz

What is the function of the retina in the human eye?

• It controls the amount of light entering the eye.

• It focuses light onto the cornea.

• It detects light and sends signals to the brain.

• It adjusts the shape of the lens.

The transparent, curved structure at the front of the eye that helps focus light is called the __________.

• Lens

• Retina

• Cornea

• Optic nerve

Which of the following best describes how an image is formed in the human eye?

• Light rays enter the eye and are absorbed by the cornea.

• The lens bends light rays to focus them onto the retina.

• The pupil enlarges the image before it reaches the retina.

• The optic nerve creates an image before sending it to the brain.

The process by which the eye changes the shape of the lens to focus on objects at different distances is known as:

• Reflection

• Refraction

• Accommodation

• Magnification

The pupil constricts when exposed to bright light to:

• Increase the amount of light entering the eye.

• Reduce the amount of light entering the eye.

• Improve focus on distant objects.

• Prevent the cornea from drying out.

The optic nerve is responsible for __________.

• Focusing light onto the retina

• Controlling the amount of light entering the eye

• Sending visual information to the brain

• Protecting the eye from infections

Which of the following is NOT a function of the lens?

• Bending light rays

• Focusing images onto the retina

• Sending signals to the brain

• Adjusting shape for near and far vision

True or False: The iris is responsible for detecting colors in the eye.

• True

• False

True or False: Short-sightedness (myopia) occurs when light focuses in front of the retina.

• True

• False

True or False: The cornea helps in focusing light but cannot adjust its shape.

• True

• False