Bio 30 Unit 1 – The Human Eye Worksheet 11



Bio 30 Unit 1 – The Human Eye Worksheet

Match the following:

1) ____ Lens a. opening in the center of the eye

2) ____ Rods b. contains the photoreceptors

3) ____ Cones c. controls the shape of the lens

4) ____ Iris d. photoreceptors for night vision

5) ____ Pupil e. contains a high density of cone receptors

6) ____ Cornea f. transparent portion of the eye that covers the front

7) ____ Sclera g. photoreceptors responsible for detailed vision

8) ____ Retina h. muscles that control the amount of light entering the eye

9) ____ Blind spot i. carries nerve impulses from the eye to the brain

10) ____ Optic nerve j. the spot where the optic nerve attached to the retina

11) ____ Fovea centralis k. interprets visual signals that have been sent from the eye

12) ____ Occipital lobe l. biconvex elastic structure that changes shape & focuses the light

13) ____ Ciliary muscles m. jelly-like fluid that helps maintain shape & focuses the light

14) ____ Aqueous humour n. tough, protective area of the eye that contains no blood vessels

15) ____ Vitreous humour o. fluid that helps maintain eye shape and nourishes the cornea

16) ____ Optic Chiasma p. the area in the brain where the two optic nerves cross

True or False:

17) ____ The iris converts light into nerve impulses.

18) ____ The cones & rods are found in the retina.

19) ____ The sclera is responsible for focusing the light.

20) ____ The eye converts light into sound waves with the tympanic membrane.

21) ____ In farsightedness, the image focuses in the eye before it hits the retina.

22) ____ When looking at objects that are close up, the eye’s lens is less convex.

Eye Review Questions:

1) Which two structures can focus the image (bend light onto the retina)? (1 mark)

2) Explain the meaning and reason behind the term “blind spot” (2 marks)

3) List 3 characteristics of the fovea centralis (see your notes and textbook) (2 marks)

4) Define accommodation and describe how this is accomplished by the eye (for viewing objects both near and far) (3 marks)

5) How do images appear on the retina? What is responsible for this? (2 marks)

6) List the unique characteristics of cones and rods (2 marks)

7) List the anatomical structures of the eye an image passes through/by in order from cornea to occipital lobe. (2 marks)

8) Name and describe 2 conditions or disorders that affect the eye. (2 marks)

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