What Is 20/20 Vision?
20/20 vision is a term used to express normal visual acuity measured at a distance of 20 feet. If you have 20/20 vision, you can see clearly at 20 feet what should normally be seen at that distance. If you have 20/100 vision, it means that you must be as close as 20 feet to see what a person with normal vision can see at 100 feet.
Does 20/20 vision mean that you have perfect vision? In fact, it is not. 20/20 vision only meant that the sharpness or clarity of vision at a distance. The top number is your distance in feet from the chart and the bottom number is the distance at which a person with normal eyesight can read the same line. Other important vision skills such as peripheral vision or side vision, eye coordination, depth perception, focusing ability and color vision, contribute to your overall visual ability. For example, if you have 20/30 vision, it means your vision is worse than average. Twenty feet away, you can read letters most people see from 30 feet.
However, you need to know 20/20 vision is not a perfect vision. A person can have 20/15 vision, which is sharper than average. The 20/15 vision means that you can see a line in the eye chart at 20 feet that the average can only see when they are 15 feet away. The purpose of glasses is to bring a person’s vision to 20/20.
Meanwhile, only 35% of all adults have 20/20 vision without glasses. Some people can see well at a distance but cannot bring nearer objects into focus. This condition can be caused by farsightedness or presbyopia. Others can see close objects clearly but cannot see those far away. This condition can be caused by nearsightedness.
Problems of 20/20 Vision
What does 20/20 vision mean? You may have some problems. You may also ask whether the 15/15 vision is better than the 20/20 vision. The answer is no. 15/15 vision indicates normal sharpness of vision at 15 feet, just as 20/20 indicates normal sharpness of vision at 20 feet.
If you have a vision slower than 20/20 vision, it may be caused by many factors, such as nearsightedness, farsightedness, astigmatism, or some eye diseases. If your vision is less than 20/20 vision, you had better wear a pair of glasses to correct your vision. If the reduced vision is due to eye disease, you had better prescribe an eye medication or another treatment.
At the same time, if you need a pair of glasses to correct your vision, you can try Koalaeye Optical and Koalaeye glasses. Koalaeye Optical is an online glasses store and provides all kinds of glasses, sunglasses and frames. Koalaeye glasses are stylish and come at a cheap price. Besides, the glasses will be mailed to you free with great convenience.
In conclusion, this post has shown the 20/20 vision meaning. If you have any different ideas for 20/20 vision meaning, you can share them in the comment zone. If you have any problems with glasses or sunglasses, you can contact us via the email firstname.lastname@example.org and we will reply to you as soon as possible.