This video covers
The structure (anatomy) of the eye
How the iris reflex works and allows us to respond to changes in light intensity

Exam board specific info:
AQA Only triple/separate science
IGCSE Edexcel Appropriate for all courses
Edexcel Only triple/separate science
OCR 21st Century Only triple/separate science
OCR Gateway Only triple/separate science. Also don't need to know the iris reflex in response to light intensity, so only the first part about structure

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