It means that when you look at something 20 feet away, you see it with the clarity that someone with good sight would see 40 feet away.It means you need glasses.
Having 20/40 vision means your daughter can see at 20 feet what a person with normal vision can see at 40 feet. Whether she needs glasses depends on her symptoms and how her vision impacts her daily life. It's best to consult with an eye care professional for a proper assessment and recommendation.
If you mean 20/60, then i'd say yes. Anyone with worse than 20/40 or 20/50 should have glasses i think.
40 ounces is equal to 5 cups, so you would need 5 glasses to hold 40 ounces of water.
40 to 20 = 2 and that is 200%: no need for rounding.
You can't go into combat if you wear glasses or contacts. You need to have 20/20 vision, and glasses and contacts, if lost or fallen and broken, would just hinder you in combat. You would need to have corrective laser eye surgery if you were to go into combat.
20 feet
If you have 20/20 vision, you typically do not need prescription glasses for vision correction. However, glasses can be prescribed for other reasons, such as reducing eye strain from prolonged screen use or protecting your eyes from harmful UV rays. It's best to consult with an eye care professional for personalized advice.
There are 8 boys and 12 girls and 8 students with glasses.
Yes you five year old should, because if he/she doesn't, his/her eyes will not be healthy when they grow up.
a humanm need 18 -20 glasses of water per day.
To find the number that, when multiplied by 20, equals 800, you would need to divide 800 by 20. This calculation would give you the answer of 40. Therefore, 40 times 20 equals 800.