But Why: A Podcast for Curious Kids cover image

Why do we have two eyes if we only see one image?

But Why: A Podcast for Curious Kids

CHAPTER

Measuring Glasses Prescription and the Use of a Retinoscope

Learn how a larger pupil and the inability to focus can be used to measure someone's glasses prescription using a retinoscope. The speaker also shares their own vision problems and hints at the benefits of glasses and contact lenses.

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