How to prevent the mask from fogging the glasses

2021-12-14 16:09:54 By : Ms. Miss Joyce

Asmae Fahmy is an award-winning freelance journalist and hospital volunteer based in Miami, Florida.

Daniella Amato is a biomedical scientist and fact checker with expertise in medicine and clinical research.

With the reopening of office spaces, many people who wear glasses may experience the annoying side effect of wearing masks at work: lens fogging.

According to Natalie Chai, an optometrist practising in Canada, the temperature difference between our lenses, breathing, and the environment can cause this lens fog.

"When the air we exhale contains water molecules, mist will occur, and it will be forced to flow upward from the inappropriate mask to the lenses of our glasses," Chai told Verywell. "When the temperature of the air we exhale is higher than the temperature of the lens, the condensation process will occur. In the case of external temperature, indoor air is much warmer than outdoor air and contains more moisture. Therefore, when you are cold When you walk into a warm building in winter, the warm and humid indoor air will come into contact with the cool lenses of your glasses, which will cool and shrink, causing condensation, which we consider as "fogging."

Experts have designed many remedies and products to alleviate this problem, some of which produce better results than others. This is their best technique, tool and mask to prevent fogging of the lens.

Sealing the top of the mask with a nose line is one of the most effective techniques to prevent the penetration of hot air.

"Masks that generate a certain amount of suction around the nose and mouth can limit fogging," Canadian optometrist and owner of Highstreet Eyecare and Clarity Eyecare Harbir Sian OD told Verywell. "A mask with a wire helps to make the mask stronger on the nose and reduces the amount of air rising toward the glasses."

Most surgical masks are equipped with a built-in nose line, which can be easily pinched in place for a better fit. However, you can easily make a DIY version of any mask using a pipe cleaner, paperclip or jewellery thread, and fix them on the bridge of your nose with fabric glue.

Researchers have found that washing the lens with soap leaves traces of soap molecules, thereby limiting fogging. Since soap is a surfactant, it reduces the surface tension of water, thereby preventing condensation.

"At the end of the day, soak your glasses in warm water with original blue Dawn dish soap, or go to Amazon to buy an ultrasonic cleaner," Kandriya, an optometrist and owner of Eyes on Hayden, Arizona Candria Krywko said it was good. "My favorite is the Magnasonic professional ultrasonic cleaner."

Choose a soap that does not contain fragrance, and then leave the glasses outside to air dry. If you need to put on the glasses right away, please do not dry them with paper towels-this will leave small fluffy pieces on the lenses. Instead, choose a microfiber cloth and pat it lightly.

There are many anti-fog products on the market, including wipes, sprays, balm, and drops. They coat your lens with a thin film to prevent condensation.

"Anti-fog wipes are my first choice because they also help to clean the lenses: by wiping the lenses, they transfer chemicals that prevent condensation. In addition, they are usually made specifically for spectacle lenses," Chai said. "This treatment is only suitable for a series of temperature changes, but not for extreme temperature changes. Anti-fog lenses will help, but from my personal experience with anti-fog lenses, they will still fog up."

However, be sure to check the composition of the product, as certain additives (such as alcohol) can damage the lenses.

"Some products claim that they can be used on other surfaces-you may want to stay away from those because the chemicals used can be a bit irritating," she said. "These ingredients may cause some coatings on the glass to crack and even cause some scratches.

Krywko tested some of these commercial remedies long before COVID-19. These are her preferred anti-fog agents:

Surgeons usually seal the top of the mask with skin safety tape or adhesive bandages to prevent airflow.

"This is a good choice, but it depends on whether the individual has sensitive skin," Chai said. "You have to make sure that the tape is medical grade, because then you will know that it does not contain latex, is porous enough to provide a certain degree of breathability, and can contain zinc oxide to help prevent infection."

Make sure to avoid household tape, such as tape, because they can irritate your skin. You can also choose double-sided tape to fix the mask on the cheeks and nose from the inside. 

Pulling on the mask and pulling down the glasses can also prevent air particles from going up the funnel. When pulling up the mask, make sure it still covers the chin. Otherwise, zoom in. 

"I have learned to do it myself," Chai said. "I put the glasses on the mask so that the nose pads are almost sealed. You need to pull up the mask a bit so that it fits under the nose pads. It's not 100%, but it does help."

If you wear progressive lenses or have a strong prescription, be aware of this technique. It may affect your vision.

Chai said: "If you look at the'optical center' of what we call glasses, you may notice that if the glasses are positioned too far, you may notice a little distortion or increased blurring of vision." A person's prescription The stronger, the smaller the margin of error, which means that even the slightest change can be significant. "

Any gap protruding from the side of the mask will open another channel, allowing air to leak.

If your mask has adjustable ear hooks, tighten them to make sure there are no openings on the sides. Otherwise, you can buy a mask extender, which can be connected to the earrings on the back of the head. This technique can reduce the burden on your ears so that they will not bear the full weight of the mask. 

A DIY trick Sian recommends is to use paper towels as a cushion.

"Place a paper towel under the top of the mask," he said. "This will help capture more air and moisture." 

To do this correctly, fold the paper towel in half and place the straight edge along the bridge of your nose. Keep a steady supply of paper towels on hand so that they can be replaced when they get wet.

There are many ways to prevent lens fogging. The tighter the mask, the smaller the chance of air escaping. Look for masks with adjustable nose lines, ear straps, and moisture-absorbing materials.

According to Krywko, you should look for some key qualities in the mask:

Although lightweight cotton or silk face masks can reduce fogging, they are not dense enough to stop COVID-19.

"In my opinion, the best mask is a mask with a nose line to better seal the bridge of the nose. It also keeps your mask upward so that it doesn't keep slipping off," Chai said. “Working in the healthcare field, I will always wear medical-grade masks, because I know the fact that made fibers are the most effective in preventing air transfer. Unfortunately, some fabric materials do not meet this standard.”

Sometimes, the best way to prevent fogging is to combine different technologies with anti-fog hoods. With this in mind, here are some very Weir’s best options.

The KN95 mask mimics the tapered shape of the traditional N95 mask, which is ideal for preventing hot air from escaping. This product from Public Goods comes in a pack of 10 and is tightly sealed so that you can easily fit your face. It is equipped with five layers and a mechanical filter, which provides 95% protection against dangerous bacteria.

This Hanes mask is equipped with all the anti-fog essentials: elastic ear straps, adjustable nose clip and moisture-proof fabric. The mask will also be adjusted according to the surrounding temperature to prevent fogging. It has adult large and adult small.

Honeywell's reusable mask has a hard shell that provides flexible breathing space and fewer gaps. The hidden pocket allows you to change the internal filter each time you use it, which also prevents moisture and fogging. To make the most of this mask, please tighten the adjustable earrings and nose clip.

The Bilio mask is designed with glasses wearers in mind. They come with a sturdy adjustable nose clip that strengthens the mask and locks in the air. This mask is available in a variety of colors and sizes, suitable for anyone.

This Under Armour mask is specially designed for athletes and is ideal for absorbing moisture before it is lost. It is designed to sit up away from your face and direct your breath forward instead of upward. In addition, it is light in weight and is lined with a polyurethane layer, which can easily absorb sweat. 

The information in this article is current as of the date listed, which means that you may receive updated information while reading this article. For the latest updates on COVID-19, please visit our Coronavirus News page.

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Malik SS, Malik SS. A simple way to prevent fogging of spectacle lenses when wearing a mask. Ann R Coll Surg Engl. 2011;93(2):168. doi:10.1308/003588411x12851639107313b

Nevias HJ. Mask strip used to prevent fogging of glasses during surgery. Eye surgery. January 1983; 14(1):87. PMID: 6828302.

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