By law, we have to verify your prescription to make sure the contacts we're sending out are correct. We can contact your eye doctor's office for you, but it can take up to one business day to hear back from them. If you're in a pinch, we also offer next business day delivery so you're never stuck without your contacts.
Online vision testing services, which allow for online prescription renewal, are currently allowed in 37 states (AL, AK, CA, CO, CT, FL, HI, IA, IL, KS, KY, MA, ME, MN, MO, MS, MT, NC, ND, NE, NH, NV, NY, OH, OK, OR, PA, RI, SD, TN, TX, UT, VA, VT, WA, WI and WY).
You can buy eyeglasses from online retailers that don't require an eye care provider's prescription certification.
For example, you tested your vision from 10 feet and read the line 5 on the Snellen chart, then your visual acuity is 10/40. To convert to 20/20-based, you divide 20 by the distance you read from and then multiply that to the second number of the line you read. In this example, you divide 20 by 10, which is 2.
A visual acuity of 6/6 is frequently described as meaning that a person can see detail from 6 metres (20 ft) away the same as a person with "normal" eyesight would see from 6 metres. The letters CF, and the testing distance, would represent the patient's acuity.
On its website, 1-800 Contacts says the tests are highly accurate. "In independent clinical trials our vision exam was as accurate as a traditional refractive exam performed by an optometrist or ophthalmologist using a phoropter," the company says.
Someone who would need strong vision correction will likely need reading glasses with a strength around +3.0, while someone who needs only minor vision correction would likely wear reading glasses with a label of +1.25. For most people new to needing readers, it's highly unlikely that they'll need a high powered lens.
Top 8 ways to improve vision over 50
- Eat for your eyes. Eating carrots is good for your vision.
- Exercise for your eyes. Since eyes have muscles, they could use some exercises to remain in good shape.
- Full body exercise for vision.
- Rest for your eyes.
- Get enough sleep.
- Create eye-friendly surroundings.
- Avoid smoking.
- Have regular eye exams.
The DMV doesn't use a traditional eyechart for the eye test. It is digital and is changed continually. They aren't dumb enough to use a chart that can be memorized.
For the nearsighted, the American Optometric Association (AOA) has determined the following levels of severity: If your number is between -0.25 and -2.00, you have mild nearsightedness. If your number is between -2.25 and -5.00, you have moderate nearsightedness.
During a vision screening, you will typically be asked to sit or stand 20 feet away from the eye chart. In instances where the optometrist's office is not 20 feet long, the chart may be located behind you and a mirror may be placed on the opposite wall to simulate a distance of 20 feet.
If you are diagnosed with 20/40 vision, it means that at 20 feet – you can only see the details that a person with normal vision sees at 40 feet.
A person must have a minimum uncorrected (no glasses or contacts) visual acuity of 20/40 to qualify for an unrestricted driver's license. A person must have a minimum corrected (with glasses or contacts) visual acuity of 20/50 to qualify for a restricted license (drive with corrective lenses).
The American Academy of Ophthalmology reports that people in most states can drive without glasses or contacts with a 20/40 test result. You may not see road signs as clearly as someone with 20/20 vision, but you're still considered a safe driver with this score.
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. Having 20/20 vision does not necessarily mean you have perfect vision.
