Light Waves and Sight

Lesson Objectives

• Explain the process of how light waves enter the eye and are interpreted by the brain.
• Describe the roles of various eye parts (cornea, iris, lens, retina, optic nerve) in vision.
• Identify common vision problems (nearsightedness, farsightedness, color blindness) and how they can be corrected.

Lesson Goals

• Understanding the process of sight.
• Recognition of the importance of different eye structures.
• Learning about the improvement of vision through corrective lenses and surgeries.

Starter Activity

• Engage students with the question: "How do we see objects around us?"
• Compare images of blurry vs. clear vision and have students describe their observations.

Scaffolder Practice (You Do)

• Students write a brief explanation of light processing in the eye.
• Distribute practice worksheets on vision problems and corrections.
• Monitor and assist students during the activity.

Instruction and Modelling (I Do/We Do)

• Conduct a class discussion on the pathway of light through the eye.
• Conduct a labeling activity using a diagram of the eye for students to identify key parts.
• Organize group work where students pair up to explain how the eye and brain collaborate.

Vocabulary

• Light wave
• Cornea
• Iris
• Pupil
• Lens
• Retina
• Rod cells
• Cone cells
• Optic nerve
• Nearsightedness
• Farsightedness
• Color blindness

Checking for Understanding

• Provide an assessment worksheet to evaluate group understanding.
• Encourage students to discuss their answers with peers.

Plenary

• Exit Ticket: Students note what they found most interesting about vision.

Extension Task

• Conduct a short individual quiz.
• Organize students in rows for the quiz.
• Results will be recorded the next day.