Most people have heard our optometrist discuss or compare our vision to 20/20 vision during our eye exam. But precisely what is 20/20 vision?
To put it simply, 20/20 vision is a term used to express the clarity and sharpness—or acuity—of sight at a range of 20 feet. A person with 20/100 vision would have to stand at 20 feet to clearly see what a person with standard vision can clearly see at a range of 100 feet. Meanwhile, a person with 20/15 vision possesses a sharpness of vision at 20 feet that someone with standard vision would experience at 15 feet.
How 20/20 Vision Is Determined
Your eye doctor can determine your visual acuity by providing tests during your eye exam. Visual acuity is usually gauged with a Snellen chart. Most of us will be asked to read letters of the alphabet from a chart. As we read a group of letters, our optometrist will display letters of progressively smaller size until we can no longer see them clearly.
Restoring 20/20 Vision
One of the most common questions from eye care patients is if their 20/20 vision can be restored. Several options can potentially restore sight to 20/20 acuity. For those with standard refractive errors, prescription eyeglasses can restore vision to a 20/20 line. Contacts are also another solution that can even help restore one’s peripheral vision to a 20/20 level.
LASIK surgery is also one of the most effective solutions for restoring vision to a 20/20 line. Some patients even report improvements of their eyesight reaching 20/15.
20/20 Vision with Astigmatism?
Yes, astigmatism is a possibility even for those with excellent clarity of vision at a distance. Many with astigmatism may experience occasional instances of blurry vision despite having great clarity at a distance.
Many optometrists will recommend prescription glasses or contact lenses to correct this. LASIK or other vision surgery will also correct astigmatism and eliminate the need for corrective lenses.
20/20 Vision but Still Need Glasses?
While having 20/20 vision is a fantastic sign that one’s vision is healthy, it does not mean that one’s vision is perfect. Many other factors go into assessing sight. Sometimes a visual deficiency elsewhere can lead an optometrist to recommend glasses.
Glasses can still improve vision for 20/20 patients who experience problems in their peripheral vision, eye focus, eye coordination, depth perception, and color vision.
To learn more about 20/20 vision, or to explore ways that your vision can be improved, book an appointment with us today.