ทำไมถึง สายตาสั้น ? (Myopia) เล่นมือถือ เล่นคอมพิวเตอร์ อ่านหนังสือใกล้ๆ | Dr. Pat

They say that using computers, playing on your phone, or reading a lot can cause nearsightedness. Is this true? What causes nearsightedness? Is it dangerous not to wear glasses? How can you prevent it from getting worse? Today, I'll tell you all about it. ^^ **Click to skip to each section below. 0:00 - Intro 0:16 - What is nearsightedness? 0:51 - Mechanisms that cause nearsightedness 0:56 - Mechanism 1: From the cornea/excessive curvature of the eye 1:18 - Mechanism 2: Longer-than-normal eyeball size (axial myopia) 1:45 - Mechanism 3: From cataracts/second sight (reverse vision) 4:06 - Causes? Why are some people nearsighted and others not? 4:24 - Cause 1: Genetics 5:18 - Cause 2: Spending time outdoors 6:00 - Cause 3: Nearsightedness 8:18 - How do you know if you have nearsightedness? 8:42 - How to correct it? 9:30 - Is not wearing glasses dangerous? 10:42 - Preventing and Delaying Myopia #myopia #nearsightedness #blurredvision #eyeglasses #secondsight