What does 2013 vision mean
What Is 20/20 Vision? By Gordon Wong, OD on May 13, 2018
Even if you do not routinely attend eye exams, you have heard the term 20/20 vision. But what does it really mean? Today, our team at Gordon Wong Eye Designs and Optometry in La Jolla, CA discuss what 20/20 vision is and how visual acuity is measured.
Our team offers comprehensive vision care, including diagnostic testing and state-of-the-art treatments. No matter what your needs, we can deliver the top-tier care you deserve.
Visual Acuity: What 20/20 Really Means
If you hold been to the eye physician, you are familiar with the Snellen chart. This simple tool measures visual acuity with lines of letters in progressively smaller type.
To understand vision testing, it is important to understand that 20/20 is considered normal vision. When an individual has 20/20 vision, it means that he or she sees the alike line of letters on the Snellen chart at 20 feet that a person with representative vision sees at 20 feet.
An individual with 20/15 vision has better-than-average vision, because he or she can see letters at 20 feet that someone with 20/20 vision can only observe at 15 feet.
In contrast, a patient with 20/40 vision sees
What Does 20/20 Vision Really Mean?
March 28, 2018
Have you ever wondered about those numbers your eye doctor mentions during an exam? When your eye doctor reports “20/20” or “20/40” vision, they’re describing your visual acuity, which is the sharpness and clarity of your eyesight.
But what do these measurements actually signify, and why is 20/20 vision considered the gold standard? Let’s explore the science behind these numbers and what they mean for your eye health.
How Vision Is Measured: The Snellen Chart
Visual acuity is measured by the Snellen chart, which typically features 11 rows of capital letters. It starts with one large letter, and as the rows continue, the font size decreases.
Vision is tested by looking at the chart from 20 feet away. You will cover one eye while reading with the other eye. Each line is coordinated with a vision level, ranging from 20/400 to 20/10.
What Is 20/20 Vision?
20/20 vision means a person has optimal vision from a distance of 20 feet.
The first number (20) represents the testing distance in feet—how far you stand from the chart. The second number indicates the distance at which a person w
What is 20/20 vision?
It sounds so futuristic; it’s a new decade and a year we’ve been eagerly anticipating here in your optometrist’s office. Why? Because we want to help all of our patients to enjoy 20/20 vision both in the year 2020 and for many years into the future.
Which brings up an interesting question: What exactly do we mean when we say someone has 20/20 vision?
The term 20/20 vision represents a benchmark in visual acuity that means a person has excellent vision. Having 20/20 vision is the gold standard of visual acuity or “clarity,” and it’s the level of quality in vision we aim to achieve with each patient by providing the highest possible level of comprehensive eye care and vision correction.
Let’s examine some of the aspects around how we measure your vision when you come in for your annual exam.
What is visual acuity?
Visual acuity is the term used to express how sharp your vision is. Optometrists can calculate a measure of your individual visual acuity by testing one eye at a time from a specific viewing distance using a Snellen eye chart.
The Snellen eye chart ― the one with the large “E” at the top
Vision is complicated. The brain, eyes, and vision are connected. So, during an eye exam, your eye doctor will perform different types of vision tests. One test is a visual acuity test to measure your central vision. Most of us have heard the term “20/20” vision. When we hear vision referred to as 20/20, we associate it with normal vision, but what exactly does 20/20 vision mean, and how is it measured? The article below will answer these questions. |
Defining 20/20 vision
How is 20/20 vision measured?
Most people are familiar with the typical eye chart used. In most cases, the chart has 11 rows of letters. The first line has large letters. Each subs
20/15 vision: Better or worse than 20/20?
When you have 20/15 vision, it’s sharper than average. In fact, it’s better than 20/20 vision. Yet neither 20/15 vision nor 20/20 vision is necessarily perfect. Read on — and remember to put on your reading glasses if you need them — to learn more about 20/15 vision.
What is 20/15 vision?
With 20/15 vision, you can see a line on what’s known as the Snellen eye chart at 20 feet that the typical person with 20/20 vision can see, only at the closer distance of 15 feet. This chart normally features a white background with black letters of various sizes.
Many young people with healthy eyes can identify at least some of the letters on the 20/15 line of the Snellen chart or, perhaps, letters that are even smaller.
Going in the other direction on the vision scale, 20/30 means you have vision problems. In this case, you’re sitting or standing 20 feet from the eye chart, but you see those letters as if they are 30 feet away.
How common is 20/15 vision?
It’s not known how many people have 20/15 vision. But it is estimated that a little over one-third of adults have 20/20 vision without glasses, contact lenses or corrective surgery. With thos