Do Humans Have Blind Spots?

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Contents

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Student worthiness

Tested and Worked.

Primary biological content area covered

Materials

Materials Required for Teacher's Use: (Figure 1)

Materials Required for Each Student: (Figure 2)

Handouts

Students will receive the Blind Spot Tester and the Diagram of the Eye hand-out, which they will color in as the parts and functions of the eye are discussed. Eye Diagram for Coloring Teacher's Key

Description of activity

The blind spot is the area on the retina without receptors that respond to light. Therefore, an image that falls on this region will NOT be seen. It is in this region that the optic nerve exits the eye on its way to the brain. Students will determine their blind spot by shifting the blind spot tester within their range of vision. [1]Students will also learn the function of the parts of the eyeball, as well as the role the eyeball plays in the nervous system.

Lesson plan

Potential pitfalls

Some difficulties that must be brought into account are, for one, that the teacher should be sure to write a word bank on the board. As the teacher goes through each letter: explaining to the students which part of the eye ball it is, it's location, and the role it plays as part of the eye; the teacher should be sure to write the parts on the board, so that the students can write their own word bank on their diagram. This way, the students are saying the part out loud, coloring it in, and then writing the word out themselves in order to increase their ability to recall the part in the future. Another difficulty is dealing with the frustration of a couple of the children over the fact that they could not find their blind spot. Some ways to appease this difficulty is by having them close their left eye instead of their right and look at the :-( symbol. This way, they may be able to find their blind spot in their right eye. Allow the students to take home their blind spot tester so that they can try it out on their parents and friends.

Artistic Connection

As the students label their diagraim, they will use a variety of colored markers in order to distinguish the different parts of the eyeball. By using different colors, the students will more readily be able to identify the individual parts. For example, a student may choose to color the pupil blue and the lens red so that they can easily find where they are located.

Literature connections

Chapter Eight, beginning on page 63, has a lot of information on the structure of the eye, while Chapter Nine, beginning on page 72, has a lot of information on the role the eyeball plays in the nervous system!

Connections to educational standards

  1. S3-4:41 Students demonstrate their understanding of human body systems by showing connections between external and internal body structures and how they help humans survive.
  2. S3-4:5 Students demonstrate their ability to REPRESENT DATA by… Classifying objects and phenomena into sets and subsets and justifying groupings...Displaying and labeling data for separate trials/observations.

Next steps

Once this activity is completed, a teacher can examine a more in-depth study of vision. The teacher can explore a greater understanding of the nervous system and the role it plays in sustaining human survival. Some other activities that can be developed involve optical illusions and experimenting with depth perception.

Reflections

-Ashley

Citations and links

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