These two terms are often used when measuring visual acuity, also known as the clarity of vision. Many people don’t know the difference between the two, and which one is better, so here’s a short primer.
If you want to learn more about your vision and how to keep your eyes healthy, book an eye exam with Infinity Vision Eye Care.
What Does 20/20 Mean in Vision?
20/20 vision is the standard for good vision. It means that an individual can see objects from 20 feet away that a person with average vision can see at that same distance. This is considered average visual acuity.
What Does 20/40 Mean in Vision?
20/40 vision is considered worse than 20/20 vision. An individual with 20/40 vision sees objects at 20 feet that a person with average vision can see at 40 feet. However it’s still within normal range of nearsightedness.
Is 20/20 Vision Better Than 20/40 Vision?
In general, 20/20 vision is considered better because it means the individual has better visual acuity and can see more clearly at a distance. Despite this, these are just different points on a visual acuity scale and don’t show a holistic picture of eye health and function.
For example, having 20/20 vision doesn’t mean your vision is perfect, and having 20/40 vision doesn’t mean your vision is poor, even though you may need glasses for certain tasks. Good eyesight goes beyond visual acuity, as other factors also determine it.
Visual acuity can change over time, especially in children, so it's important to have regular eye exams to check for any changes in your eyesight. This is especially important for people who have a family history of eye problems or who have other medical conditions like diabetes that could affect their eyesight.
Book a Comprehensive Eye Exam With Infinity Vision Eye Care
To get a holistic picture of your visual health and acuity, contact Infinity Vision Eye Care in Whitby today to schedule a comprehensive eye exam.