The speed is not stable/constant , it`s changing
1. Don't smoke.
2. Drink lots of water.
3. Try not to scream or yell.
4. Do a lot of vocal warm ups!
The procedure is a refraction or vision test. The doctor may use a computerized refractor or simply shine a light into your eyes.
For every 25 pounds a person is overweight, they should consume "8 Ounces" <span>more water than average.
Hope this helps!</span>
