How is myopia treated? And does it have long-lasting effects on a child's eyesight?

Myopia is corrected with spectacles. There is no cure for myopia and the best thing one could do is to try and slow down it's progression. Practicing good eye care habits would help. Some good eye care habits include: - Holding reading material 30 cm away from the face/eyes, and try to read while sitting upright rather than lying down - When watching television, the television should be approximately 2-metres away - Computer screens should be approximately 50 cm away from the eyes and adjusted to minimize glare - Lighting should be sufficient to illuminate the room when reading, using the computer or watching television, but not cause any glare - Encourage your child to take a break to rest the eyes every 30 to 40 minutes of reading or watching television; look out the window at far away objects and do eye exercises to relax the eyes - Encourage children to spend more time outdoors. For more information, do take a look at this article: http://www.snec.com.sg/eye-conditions-and-treatments/common-eye-conditions-and-procedures/pages/childhood-myopia.aspx