The Eye and Seeing

Name: The Eye and Seeing
Author: StemPy Lab

Close your eyes and open them. In a moment, an image forms on a screen at the back of each eye, and your brain turns it into a picture. In this course we study the parts of the eye, how it focuses on near and far objects, and how spectacles correct the eyes of a person who is short sighted or long sighted.

3 lessons, about 1 h 20 min3 simulations12 problems6 practice questionsPython in every lesson

Created by StemPy Lab

Course outline (3 lessons)

Lesson 1about 30 min
How the eye forms an image
The eye is like a camera. The cornea and the lens bend the light and form a real, inverted and small image on the retina. The iris changes the size of the pupil to control the light that enters. The retina turns the image into signals, and the optic nerve takes them to the brain.
1 simulation2 practice questions1 Python program3 problems
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Lesson 2about 25 min
Near point, far point and accommodation
The eye can focus on near and on far objects, because the ciliary muscles change the shape of the lens. This is accommodation. The least distance of distinct vision, the near point, is about 25 cm for a normal eye. The far point of a normal eye is at infinity.
1 simulation2 practice questions1 Python program3 problems1 Python lab
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Lesson 3about 25 min
Defects of vision and their correction
In short sight (myopia), the eye sees near objects but not far ones. The image forms in front of the retina, and a concave lens corrects it. In long sight (hypermetropia), the eye sees far objects but not near ones. The image forms behind the retina, and a convex lens corrects it. Presbyopia comes with age and needs a bifocal lens.
1 simulation2 practice questions1 Python program6 problems1 Python lab1 question set1 note
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Eye and Vision: Practice Paper

15 questions · 20 min

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The Eye and Seeing

Course outline (3 lessons)

How the eye forms an image

Near point, far point and accommodation

Defects of vision and their correction

Test Your Learning

Your teacher

Discussion (0)