science eye

What is the function of the cornea in the eye?

• Determines the color of the iris

• Regulates the size of the pupil

• Contains photoreceptor cells

• Covers the front part of the eye and refracts incoming light

Answer explanation

The cornea covers the front part of the eye and refracts incoming light, helping to focus light onto the retina for clear vision.

Which part of the eye is responsible for regulating the amount of light that enters?

• Lens

• Iris

• Retina

• Cornea

Answer explanation

The iris is responsible for regulating the amount of light that enters the eye by adjusting the size of the pupil.

What determines the color of the iris in the eye?

• Amount of melanin present

• Number of cone cells

• Thickness of the lens

• Shape of the cornea

Answer explanation

The color of the iris in the eye is determined by the amount of melanin present.

What is the role of rod cells in the eye?

• Focus light onto the retina

• Regulate the size of the pupil

• Enable us to see in the dark and determine shapes

• Allow us to see color

Answer explanation

Rod cells in the eye enable us to see in the dark and determine shapes, making them crucial for low-light vision.

What is the function of cone cells in the eye?

• Provide night vision

• Allow us to see black, white, and shades of grey

• Enable us to see color

• Determine the shape of objects

Answer explanation

Cone cells in the eye enable us to see color, allowing us to perceive a wide range of hues and shades in our vision.

What is the purpose of the optic nerve in the eye?

• Regulate the size of the pupil

• Focus light onto the retina

• Convert light energy into electrical impulses

• Carry nerve impulses to the brain

Answer explanation

The purpose of the optic nerve in the eye is to carry nerve impulses to the brain, allowing visual information to be processed and interpreted.

Which part of the eye is responsible for changing the thickness and curvature of the lens?

• Cornea

• Iris

• Ciliary muscle

• Retina

Answer explanation

The ciliary muscle is responsible for changing the thickness and curvature of the lens in the eye.

What is the function of the vitreous humor in the eye?

• Focus light onto the retina

• Provide support and maintain the shape of the eye

• Regulate the size of the pupil

• Convert light energy into electrical impulses

Answer explanation

The vitreous humor provides support and maintains the shape of the eye, helping to keep the eye structure intact.

What is the purpose of the suspensory ligaments in the eye?

• Focus light onto the retina

• Connect the ciliary muscle to the lens

• Convert light energy into electrical impulses

• Regulate the size of the pupil

Answer explanation

The purpose of the suspensory ligaments in the eye is to connect the ciliary muscle to the lens.

What is the role of the rod cells and cone cells in the retina?

• Enable us to see color and determine shapes

• Convert light energy into electrical impulses

• Focus light onto the retina

• Regulate the size of the pupil

Answer explanation

Rod cells and cone cells in the retina enable us to see color and determine shapes.