Name: 什麼是白內障？| 白內障是什麼？ (What is a Cataract? | #aumsum)
Uploaded: 2021-01-14T08:10:52.000Z
Duration: 1 min 1 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

Each of our eyes consists of a transparent lens.

Our eye lens is made up of water and protein.

They are arranged in such a way that keeps the lens clear, and lets light pass through it.

Hence, a sharp image is formed on the retina.

However, as we age, the protein begins to clump together, making the lens cloudy.

This clouding of our eye's natural lens is called a cataract.

In such situations, when light from an object enters our eye, the clumped protein blocks or scatters the light.

As a result, a blurred image is formed on the retina, thus making it hard to see.

For more educational videos please visit http://www.SmartLearningforAll.com

Also, don't forget to subscribe to our YouTube channel.

字幕列表影片播放

什麼是白內障？| 白內障是什麼？ (What is a Cataract? | #aumsum)

subscribe

absolutely

disease

protein