Eye vs camera

Which of the following options describes how the lens changes as an object moves towards the eye to maintain focus?

• changes shape by getting thinner

• changes shape by getting fatter

• moves closer to the retina

• moves away from the retina

We cannot see the movements of our eyeball in the mirror.

• true

• false

Which of the following options accurately describes the lens in the human eye in contrast to the use of lens in good quality cameras?

• focus blue and red light to the same point

• cannot focus blue or red light

• is not achromatic, but we have adaptations so we don't notice poor focusing

• is monochromatic

What happens when we move our eyes?

• we go blind

• we see a blur

• nothing happens

• the lens changes shape

We have photoreceptors in the blind spot.

• true

• false

Which one is the retina?

• A

• B

• C

• D

Usually we have four types of photoreceptors - three to see in normal light condition and one for low light.

• true

• false

What are the similarities between the eye and the camera?

• lens and sensors

• lens and retina

• retina and sensors

• lens and iris

Why can a dim star disappear from view when we look directly at it?

• it goes out of focus so it is too blurry to see

• there are no photoreceptors for dim light in the center of the retina

• it desn't start to disappear

• we have a blind spot where there are no photoreceptors

Which statement accurately describes the photoreceptors for color vision in the human eye?

• are evenly distributed on the retina

• all work at the same speed

• have colored filters on top of them

• are sensitive to different wavelengths of light