1. List three things you’ve learnt about the eye that you didn’t know last week! 1. 2. 3. Do Now Stretch Opportunity: Draw a diagram to show how the eye focuses on near objects, and one to show how it focuses on far objects. Compare eyes to cameras. Explain what causes short and long-sightedness and how to use lens to correct vision. Calculate the power of a lens from its focal length using P=1/f Keywords short sighted long sighted dioptres (d) polycarbonate refractive index focal length Long and Short Sight

2. Independent Work Stretch Opportunity: Explain what bifocals are and why they are needed by some people. Compare eyes to cameras. Explain what causes short and long-sightedness and how to use lens to correct vision. Calculate the power of a lens from its focal length using P=1/f Keywords short sighted long sighted dioptres (d) polycarbonate refractive index focal length Correcting Vision Range of Vision: Near point to far point. Find out about long and short sightedness. Use the information sheets to complete the task.

3. Mini- plenary Compare eyes to cameras. Explain what causes short and long-sightedness and how to use lens to correct vision. Calculate the power of a lens from its focal length using P=1/f Keywords short sighted long sighted dioptres (d) polycarbonate refractive index focal length Correcting Vision QUICK QUESTIONS: What is the difference between... 1.Long sight and short sight? 2.Glass and polycarbonate? 3.Power and focal length? 4.How to treat long sight and short sight?

4. Independent Work Stretch Opportunity: Use the 5-6 marks success criteria. Compare eyes to cameras. Explain what causes short and long- sightedness and how to use lens to correct vision. Calculate the power of a lens from its focal length using P=1/f The Eye Comparing Eyes and Cameras Use the information sheet to complete a paragraph comparing the structure of the eye to the structure of a camera. Success Criteria: You should include: 1-2 Marks – two similarities between the camera and the eye. 3-4 Marks – three or four similarities and explain how they are similar. 5-6 Marks – a critical comparison of the camera and eye. Explain some similarities and differences and give an opinion as to how similar they are and why. Keywords short sighted long sighted dioptres (d) polycarbonate refractive index focal length

5. Exit Task Keywords short sighted long sighted dioptres (d) polycarbonate refractive index focal length Compare eyes to cameras. Explain what causes short and long-sightedness and how to use lens to correct vision. Calculate the power of a lens from its focal length using P=1/f The Eye Team Quiz! Blockbusters plenary.ppt

6. Mini-Plenary Keywords iris pupil lens cornea suspensory liagments ciliary muscles Compare eyes to cameras. Explain what causes short and long-sightedness and how to use lens to correct vision. Calculate the power of a lens from its focal length using P=1/f Eye Bingo Retina Optic nerve Dissection Ciliary muscle Iris Pupil Refraction Focus Cornea Lens Draw a bingo card. Pick 6 of the words below and write them into your bingo card. Ligaments