English National Curriculum - Science

The eye

Mission Objectives

Describe the causes of long and short-sightedness

Explain how convex and concave lenses are used to correct vision defects

Compare different treatments for vision problems

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Keywords

Words and meanings to learn

cornea

the transparent outer layer at the front of the eye that refracts light to help focus it onto the retina

ciliary muscles

muscles that contract or relax to change the shape of the lens during accommodation, allowing the eye to focus on near or distant objects

pupil

the hole in the centre of the iris through which light enters the eye

iris

a ring of muscle that surrounds the pupil and controls its diameter, regulating the amount of light entering the eye

lens

flexible, transparent structure in the eye that changes shape to focus light onto the retina

Required Resources

  • Model of an eye
  • Equipment for class dissection of a bull's eye
  • Gloves
  • Scalpel and scissors
  • Dissecting boards
  • Disposal bags
  • Virkon
  • Pointer
  • Lenses
  • Handouts

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