Lesson Plan: B2.1.08

LESSON PLAN

Teacher	Subject	Period	Date	Year	Ability	LSA/Other Support
	Science

Context and Landmark Assessment	B2.1.08 Landmark Assessment: Progress Observation Opportunity

Remember to have high expectations

Lesson Title: Today we are learning about
How does the eye work?

Remember to check for PROGRESS
Focus on Knowledge, Skills and Understanding

Success Criteria:	You will show your learning by...
Students should be able to relate the structures of the eye to their functions. This includes accommodation to focus on near or distant objects. Another adaptation is to dim light - The eye is a sense organ containing receptors sensitive to light intensity and colour. Students should be able to identify the following structures on a diagram of the eye and explain how their structure is related to their function: ? retina ? optic nerve ? sclera ? cornea ? iris ? ciliary muscles ? suspensory ligaments. Accommodation is the process of changing the shape of the lens to focus on near or distant objects. To focus on a near object: ???? the ciliary muscles contract ?? the suspensory ligaments loosen ???? the lens is then thicker and refracts light rays strongly. To focus on a distant object: ? the ciliary muscles relax ? the suspensory ligaments are pulled tight ? the lens is then pulled thin and only slightly refracts light rays. Two common defects of the eyes are myopia (short sightedness) and hyperopia (long sightedness) in which rays of light do not focus on the retina. ??? Generally these defects are treated with spectacle lenses which refract the light rays so that they do focus on the retina. New technologies now include hard and soft contact lenses, laser surgery to change the shape of the cornea and a replacement lens in the eye. Students should be able to interpret ray diagrams, showing these two common defects of the eye and demonstrate how spectacle lenses correct them.

Success Criteria:

You will show your learning by...

Students should be able to relate the structures of the eye to their functions. This includes accommodation to focus on near or distant objects.
Another adaptation is to dim light - The eye is a sense organ containing receptors sensitive to light intensity and colour.
Students should be able to identify the following structures on a diagram of the eye and explain how their structure is related to their function: ? retina ? optic nerve ? sclera ? cornea ? iris ? ciliary muscles ? suspensory ligaments.
Accommodation is the process of changing the shape of the lens to focus on near or distant objects.
To focus on a near object: ???? the ciliary muscles contract ?? the suspensory ligaments loosen ???? the lens is then thicker and refracts light rays strongly. To focus on a distant object: ? the ciliary muscles relax ? the suspensory ligaments are pulled tight ? the lens is then pulled thin and only slightly refracts light rays.
Two common defects of the eyes are myopia (short sightedness) and hyperopia (long sightedness) in which rays of light do not focus on the retina. ???
Generally these defects are treated with spectacle lenses which refract the light rays so that they do focus on the retina.
New technologies now include hard and soft contact lenses, laser surgery to change the shape of the cornea and a replacement lens in the eye.
Students should be able to interpret ray diagrams, showing these two common defects of the eye and demonstrate how spectacle lenses correct them.

Think about how you can match the needs of ALL students

Keywords:

Links: Literacy, Numeracy, SMSC, British values

Memory Anchor:

AFL/Key Questions:

How do the cilliary muscles and the suspensory ligaments allow the eye to focus on near or distant objects?
The cilliary muslces Adjust the shape of the lens to make it more or less curved, so as to increase or decrease the refraction of light and the suspensory ligaments Slacken or stretch as the ciliary muscles contract or relax, to adjust the thickness and curvature of the lens. This in turn allows differences in the refraction of light onto the retina and therefore allows the eye to focus.
How is the eye adapted to its function?
The eye is a sense organ containing receptors sensitive to light intensity and colour.
How are the structures of the following related to their functions: - retina - optic nerve - sclera - cornea - iris - ciliary muscles - suspensory ligaments?
Retina - contains the photo receptors to allow us to see. Optic nerve - Transmits signals from the photo receptors to the CNS through being a nerve cell. Sclera - Relatively tough outer casing of the eye for protection. Cornea - Transparent layer to allow light in. IT is curved to refract light. Iris - made of muscle to alter the amount of light entering the eye. Ciliary muscles - made of muscular tissue which contract or relax to move the suspensory ligaments. Suspensory ligaments - attached to the ciliary muscles and lens to aid accommodation.
What is accommodation?
Accommodation is the process of changing the shape of the lens to focus on near or distant objects.
What processes must the eye go through in order to focus on a near object or on a distant object?
To focus on a near object the eye must do the following: 1. The ciliary muscles contract. 2. The suspensory ligaments loosen. 3. The lens is then thicker and refracts light rays strongly. To focus on a distant object: - The ciliary muscles relax. - The suspensory ligaments are pulled tight - The lens is then pulled thin and only slightly refracts light rays.
What are myopia and hyperopia and how do they affect the eye?
Myopia is short sightedness and hyperopia is long sightedness and this causes rays of light to not focus on the retina.
What are myopia and hyperopia usually treated with and how do they help?
Generally these defects are treated with spectacle lenses which refract the light rays so that they do focus on the retina.
What new technologies are there in place to treat eye defects?
New technologies now include hard and soft contact lenses, laser surgery to change the shape of the cornea and a replacement lens in the eye.

Identify questions for high, middle, low and identify questioning techniques- Challenge questions

Learning Phases/Episodes

Think about how you can match the needs of ALL students
Differentiation: AGT, SEND, LLL, Disadvantaged
Remember to check for PROGRESS

Starter Activity	Differentiation and Challenge question/task
Students to copy and complete the keywords. Teacher reveals missing letters; Students correct mistakes; Discuss the scientific meanings of the words. Students to write down the definitions of the most important / new keywords. Discuss the 'Memory Anchor'. What does it show? How does it relate to the what we are learning about today (title)?

Think about PACE – Develop, consolidate and deepen knowledge, skills and understanding

Teacher or Student lead?	Differentiation and Challenge question/task

Progress Check	Extension

Remember to give time to apply knowledge, skills and understanding

Teacher or Student lead?	Differentiation and Challenge question/task

Progress Check	Extension

Teacher or Student lead?	Differentiation and Challenge question/task

Progress Check	Extension

Teacher or Student lead?	Differentiation and Challenge question/task

Progress Check	Extension

Plenary	Differentiation and Challenge question/task
Students to answer the 'Key Questions' with learning partners.
Progress Check Teacher to reveal and discuss the answers to the questions.	Extension What have learnt about the 'Big Ideas' today?

Homework	Differentiation and Challenge question/task