GCSE Biology - How the Eye Works (Part 1) - Structure of the Eye & Iris Reflex
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YouTubeCognito
GCSE Biology - How the Eye Works (Part 1) - Structure of the Eye & Iris Reflex
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 ...
547K viewsJan 13, 2020
Pupillary Distance Measurement
Pupillary Distance (PD) measurement helps ensure that your glasses give you the clearest vision for your prescription. Here's a short video to help you measure your PD in 5 simple steps 📏👓: | Clearly
1:19
Pupillary Distance (PD) measurement helps ensure that your glasses give you the clearest vision for your prescription. Here's a short video to help you measure your PD in 5 simple steps 📏👓: | Clearly
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