Using a Home Vision Test to Order Glasses Online
Edited By Vered Hazanchuk
Ordering glasses and contacts online is a tempting option. But how reliable are home vision tests, and should you use them to order new lenses?
“The public should understand that that these online tests can measure the power of your eyeglass prescription, but they can’t detect eye diseases that often have hidden symptoms,” said Michael X. Repka, MD, medical director of government affairs for the American Academy of Ophthalmology.
“While online tests for glasses prescription may be okay for adults 18-39 years of age with healthy eyes, they are not appropriate for those with an eye condition or risk factors for eye disease – such as having diabetes or a family history of glaucoma – or for those who have not had a recent eye examination.”
- How do home vision tests work?
Do-it-yourself vision exams are easy to find online. Verana Health offers a free app that allows patients to measure their vision using their smartphone and monitor changes in their sight over time. EyeQue’s Personal Vision Tester pairs your smartphone with a handheld miniscope to generate a personalized eyeglass prescription. And various other websites offer vision tests using a mobile device.
Some of these services ask you to stand about 10 feet away from your device in a well-lit area and speak the letters aloud as you look at an eye chart. Others, like EyeQue’s test, use a handheld device to check vision. The results are then reviewed by an ophthalmologist or optometrist, who issues a prescription that you can use to buy glasses online.
- Never use a home vision tests to order contacts
Experts strongly caution against using home eye exams to order contact lenses. Contacts should be fitted by an ophthalmologist or optometrist, who are trained to check for a good fit. Improperly fitting contact lenses can cause a range of complications, from redness and irritation to potentially blinding conditions such as a corneal infection.
- How reliable are home vision tests?
While mobile apps and other technologies are constantly improving, a home vision test won’t be as accurate or reliable as a test done by your optometrist or ophthalmologist.
A home vision test also won’t detect serious eye problems or underlying health conditions. Adults ages 18-39 years still need to have comprehensive eye exams every five to 10 years, even if they have no eye symptoms or risk factors for eye disease. These exams can detect common eye diseases as well as hidden conditions that may lead to blindness if not properly treated.
- Should I measure my vision at home?
Whether you should rely on a home vision test depends on your age, medical history and other factors.
Online vision testing should be limited to healthy adults (ages 18-39 years) who have a mild or moderate eyeglass prescription and no symptoms of eye disease.
It’s important to keep the following points in mind:
- Home vision exams are best used to update an existing prescription in adults who previously had a comprehensive eye exam.
- All corrective eyewear prescriptions must always be approved by an optometrist or ophthalmologist.
- If you have a high-power or irregular prescription, skip the home vision tests and schedule an exam with your ophthalmologist or optometrist.
- If you’re at risk for eye disease or have eye symptoms, see an ophthalmologist. Always schedule follow-up visits at the frequency your ophthalmologist recommends.
Even if you’re perfectly healthy, the best way to protect your vision is by having in-person comprehensive eye exams every year.
By John Egan
From her home, Heather Burgett sees the smoky haze from wildfires ravaging the Los Angeles area. She feels the impact of that wildfire smoke, too.
Burgett’s throat is scratchy, prompting her to stock up on cough drops. She also is experiencing exhaustion, a possible byproduct of her body ridding itself of airborne toxins. And she is coping with watery, itchy eyes.
“I wear contacts, so I’ve been only able to wear them for a short time, and then I have to switch to glasses,” says Burgett, a public relations professional who lives in Santa Monica.
“It’s nothing all that dramatic compared to all the people that have lost homes, but living in this toxic air does have its effects,” she adds.
Wildfire smoke’s effect on vision
During the 2019 wildfire season, Burgett and thousands of her Southern California neighbors have struggled with vision problems as a result of the smoky, toxic air. In particular, wildfires generate carbon and dust particles that irritate your eyes, according to the American Academy of Ophthalmology (AAO).
Doctors say symptoms of eye irritation triggered by wildfire smoke include burning, itching, tearing up, redness, grittiness, temporarily blurred vision, and aggravation of dry eye and allergy conditions.
“Even a healthy person’s eyes can be bothered by prolonged exposure to smoke,” says Dr. Robert Weinreb, chairman and distinguished professor of ophthalmology at the University of California, San Diego.
Fortunately, wildfire smoke should not lead to major, persistent vision loss, according to Dr. Gerami Seitman, an ophthalmologist at UCSF Medical Center in San Francisco.
How to protect your eyes from smoke
Seitman and Dr. Matilda Chan, a fellow ophthalmologist at UCSF Medical Center, and Dr. Vivian Shibayama, an optometrist at UCLA’s Jules Stein Eye Institute in Los Angeles, share their advice for preventing and treating eye irritation caused by wildfire smoke. Their tips include:
- STAY INSIDE: If possible, stay indoors with the windows closed when outdoor air quality is poor.
- USE AN AIR PURIFIER: While you’re indoors, use an air purifier to decrease the presence of eye irritants.
- WEAR GLASSES, NOT CONTACTS: Don’t wear your contact lenses, as they attract airborne particles from wildfire smoke.
- PROTECT YOUR EYES OUTDOORS: If you’ll be spending a lot of time outdoors, wear wrap-around goggles to reduce exposure to wildfire smoke. Don’t have wrap-around goggles? Prescription eyeglasses or sunglasses can help block eye irritants.
- RINSE OUT YOUR EYES: Wash away eye irritants with over-the-counter saline rinse or artificial tears. If you’re using artificial tears more than four times a day, stick with the preservative-free variety. The American Academy of Ophthalmology recommends storing artificial tears in your refrigerator to add eye-cooling relief.
- TRY EYE DROPS FOR RELIEF: If itchy eyes are bugging you, try over-the-counter, itch-alleviating antihistamine eye drops.
- APPLY A COMPRESS: Place a cold compress to your closed eyes to help alleviate itching.
- SEE AN EYE DOCTOR: If your symptoms don’t improve, make an appointment with an eye care provider.
Smoke’s effects can linger after fires are out
Don’t overlook the fact that even when the smoke has cleared, barely visible ash and dust can remain in the air for up to two weeks after a wildfire has been extinguished, according to the AAO.
Also, keep in mind that eye irritation is a comparatively minor inconvenience when you consider the devastation of wildfires.
As of early November, nearly 6,200 blazes had scorched close to 200,000 acres during California’s 2019 wildfire season, damaged or destroyed 725 structures, and killed three people.
By the way, wildfires aren’t confined to California. Wildfires occur across the U.S., meaning smoke from burning grass, trees and homes could pose a health – and vision – hazard wherever you live.
Glasses can act as a barrier between you and a person who is coughing or sneezing, but that also means the virus can lurk on the surface.
May 20, 2020, 5:10 AM PDT / Source: TODAY
By A. Pawlowski
Amid all the warnings about contaminated surfaces possibly spreading the new coronavirus, many people may not be aware of a “surface” they’re touching all day: their glasses.
When going out in public, prescription specs or sunglasses can serve as a kind of barrier between the wearer and strangers who are coughing or sneezing, with the respiratory droplets landing on the lenses.
The virus can persist on glass for up to four days, one study found. It can also be detected for up to two to three days on plastic and stainless steel — materials that may be used in lenses and frames.
People often take glasses on and off all day, potentially transferring more of the virus onto their specs with their hands. Some rub their eyes after handling glasses or put the tips of the frame into their mouths, potentially exposing them to the pathogen.
NBC contributor believes he got coronavirus through his eyes — how does that happen?
Dr. Barbara Horn, president of the American Optometric Association, said she’s become much more conscious of the cleanliness of her eyewear during the pandemic.
“It’s very important,” Horn, an optometrist who lives in Myrtle Beach, South Carolina, told TODAY.
“I’m certainly not saying glasses are the main culprit by any means, but you just always want to be careful — making sure you’re cognizant of the fact that glasses can transfer (the virus) and be aware of how to clean them properly.”
Here are Horn’s tips for disinfecting glasses:
Clean your glasses after being out in the public:
Horn doesn’t need prescription glasses, but wears sunglasses constantly and makes sure to clean them after a trip to the grocery store or other places where she’s around other people.
“Every time I walk in my home, the first thing I do is… wash my hands and then wash my glasses,” Horn said.
Soap and water are the best option
The new coronavirus is very sensitive to all soaps, said Dr. Joseph Vinetz, an infectious disease doctor at Yale Medicine in New Haven, Connecticut.
Always rinse the lenses first with water to avoid grinding any particles that may be on the surface into the glasses and scratching them, Horn advised.
Put a drop or two of soap, like dish soap, onto the lens and rub it around lightly with a microfiber cloth.
Disposable lens cleaning wipes can work, too.
Make sure to clean the nose pads, which touch the face constantly and can get dirty, and the edge where the lens meets the frame: “Lots of dust and debris can get trapped in that little space,” Horn said.
Don’t forget to clean the frame, including the earpiece that goes behind the ear.
Rinse and dry with a soft cloth. Avoid using paper towels, which have fibers that can easily scratch lenses. If using a non-disposable cloth to clean glasses, wash that cloth as well after cleaning the specs.
It’s the same procedure for sunglasses.
Don’t worry about the little screws in the frame rusting if you wash your glasses. It shouldn’t happen if you let the frame air dry, plus screws can be easily replaced, so that shouldn’t be a concern, Horn said.
Don’t blow on glasses to clean them
Many people use their breath to steam up the lenses to try to clean them. “Especially right now, you don’t want to breathe on your glasses,” Horn said, to avoid putting any germs on them.
Don’t use rubbing alcohol or bleach
These cleaning agents can be harsh on anti-reflective or non-glare coatings on lenses, Horn cautioned. They could also make the frame more brittle. Stick to soap and water.
Household disinfecting wipes should be OK to use occasionally on frames, but again, skip the lenses, she advised.
Don’t put the frames in your mouth
It’s a common habit, but it’s not a good idea since frames may be germy and potentially lead to an infection, “especially during these times,” Horn said.
The same goes for rubbing your eyes, especially since coronavirus can enter the body through them, binding to receptors on the surface of the eyes and spreading throughout the body, NBC News medical correspondent Dr. John Torres told TODAY.
Another reason: People can actually go blind from rubbing their eyes because they can break down the front layer of the cornea, Horn warned.
Touching glasses can potentially spread germs so cleaning them throughout the day — especially during a pandemic — would be ideal, Horn said.