GCSE Biology - How the Eye Works (Part 1) - Structure of the Eye & Iris Reflex #31

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