Anatomy - Questions

Light Collection
Light Detection
Auto-focus
Pupil Size

Anatomy

In the eye, light is focused by
(A) the lens alone.
(B) the cornea alone.
(C) both the lens and the cornea.
(D) neither the lens nor the cornea.

Questions --- What this question is about
109.1

In the eye, light is focused by
(A) the lens alone.
No. The Cornea focuses light.

Try again.
Questions --- What this question is about
109.1

In the eye, light is focused by
(B) the cornea alone.
No. --- The lens focuses light.

Try again.
Questions --- What this question is about
109.1

In the eye, light is focused by
(C) both the lens and the cornea.
Yes. --- Each supplies some convergence.

Check the other answers.
Questions --- What this question is about
109.1

In the eye, light is focused by
(D) neither the lens nor the cornea.
No. --- What else could do it?

Try again.
Questions --- What this question is about
109.1

The retina of the eye
(A) is where light enters the eye.
(B) is where light is focused.
(C) is where light is detected.
(D) determines the size of the pupil.

Questions --- What this question is about
109.2

The retina of the eye
(A) is where light enters the eye.
No. --- That is the pupil.

Try again.
Questions --- What this question is about
109.2

The retina of the eye
(B) is where light is focused.
No. --- That happens at the cornea and lens.

Try again.
Questions --- What this question is about
109.2

The retina of the eye
(C) is where light is detected.
Yes. --- The detecting cells are on the retina.

Check the other answers.
Questions --- What this question is about
109.2

The retina of the eye
(D) determines the size of the pupil.
No. --- The iris does that.

Try again.
Questions --- What this question is about
109.2

The eye adapts its focus to objects at different distances by
(A) opening and closing its pupil.
(B) lengthening and shortening the eyball.
(C) stretching and relaxing its lens.
(D) modifying its cornea.

Questions --- What this question is about
109.3

The eye adapts its focus to objects at different distances by
(A) opening and closing its pupil.
No. --- That adapts to light intensity.

Try again.
Questions --- What this question is about
109.3

The eye adapts its focus to objects at different distances by
(B) lengthening and shortening the eyball.
No. --- That would work but it is not what happens.

Try again.
Questions --- What this question is about
109.3

The eye adapts its focus to objects at different distances by
(C) stretching and relaxing its lens.
Yes. --- That makes the lens less or more convergent.

Check the other answers.
Questions --- What this question is about
109.3

The eye adapts its focus to objects at different distances by
(D) modifying its cornea.
No. --- Eye surgeons do that.

Try again.
Questions --- What this question is about
109.3

The eye adapts to changing light intensity by
(A) opening and closing its pupil.
(B) lengthening and shortening the eyball.
(C) stretching and relaxing its lens.
(D) modifying its cornea.

Questions --- What this question is about
109.4

The eye adapts to changing light intensity by
(A) opening and closing its pupil.
Yes. --- To admit more or less light.

Check the other answers.
Questions --- What this question is about
109.4

The eye adapts to changing light intensity by
(B) lengthening and shortening the eyball.
No. --- That would not change the amount of light admitted.

Try again.
Questions --- What this question is about
109.4

The eye adapts to changing light intensity by
(C) stretching and relaxing its lens.
No. --- That adapts the focus to near or distant objects.

Try again.
Questions --- What this question is about
109.4

The eye adapts to changing light intensity by
(D) modifying its cornea.
No. --- Only surgeons do that.

Try again.
Questions --- What this question is about
109.4