A prescription can not help to determin what a patient's overall visual acuity is. Your visual acuities are determined based on a test using the Snellen chart at a distance of 20 ft. Your VAs are also different "corrected" or "uncorrected", one meaning with your glasses and the later meaning without your glasses on. Those numbers will be different. Ask your eye care provider for the information that your doctor obtained during your examination. Thank you.
22.5
450 - 20% = 360
100% = 450 1% = 450/100 20% = (450/100) x 20 = 9000/100 = $90
1/20 or 1 over twenty
20 percent of 450 is 90.
450 decreased 20% results in: 360
Yes, 20 15 vision is better than 20 20 vision.
It means seeing at 20 feet what a person with normal vision sees at 20 feet. A person who has 20/40 vision can see at 20 feet what the person with normal vision sees at 40 feet, etc. Some people have better than 20/20 vision.
2-450= -430
20/10 vision refers to vision better than 20/20. A person having 20/10 vision would be able to see something at 20 feet that a person with 20/20 vision would see at 10 feet.
The typical range of eye vision for humans is between 20/20 and 20/200. 20/20 vision is considered normal, while 20/200 vision is considered legally blind.
200/900, 100/450, 22/99 are some examples.