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It's one of the most common things to hear amidst the coronavirus pandemic — wash your hands with soap and water for 20 seconds. This is one of the Centers for Disease Control and Prevention's (CDC) main recommendations for killing germs. But the question remains: why should you wash your hands for 20 seconds, specifically? The 20-20-20 rule involves taking a 20-second break from looking at a screen every 20 minutes. During the break, a person focuses on an object that is at least 20 feet away, which relaxes the eye muscles. Large Stopwatch - Use the Stopwatch in FULL SCREEN. Great for meetings, classrooms, conferences, schools, anywhere really... :-) Results of a 2013 study involving 795 university students suggested that those who periodically refocused on distant objects while using the computer had fewer symptoms of computer vision syndrome, which include eye strain, watering or dry eyes, and blurred vision. An eye doctor may need to evaluate their vision and test the level of moisture in the eyes. When making recommendations, the doctor will take a person’s occupation and overall eye health into account.

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The conversion factor from seconds to minutes is 0.016666666666667, which means that 1 second is equal to 0.016666666666667 minutes: Let's take a closer look at the conversion formula so that you can do these conversions yourself with a calculator or with an old-fashioned pencil and paper. Here are some great pre-set timers ready to use. They range from a 1 second timer - up to a year timer! It's pointless - but you asked for it! :-) An alternative is also that one minute is approximately three times twenty seconds. Conversion table seconds to minutes chart The units involved in this conversion are seconds and minutes. This is how they are defined: SecondCalculation will be performed just after the operation selected. You can increase or descrease the hours, minutes and seconds value of time by your keyboard up and down keys. Now button will set the starting time to the current time. And the clear button resets the time inputs. The 20-20-20 rule is a popular way to reduce eye strain caused by looking at digital screens for long periods. The following is a list of definitions relating to conversions between seconds and minutes. What is a second (s or sec)? Alrasheed, S. H. et al. (2020). Impact of an educational intervention using the 20/20/20 rule on computer vision syndrome. Fuls, J.L. (2008) Alternative hand contamination technique to compare the activities of antimicrobial and nonantimicrobial soaps under different test conditions. Applied and Environmental Microbiology, https://pubmed.ncbi.nlm.nih.gov/18441107-alternative-hand-contamination-technique-to-compare-the-activities-of-antimicrobial-and-nonantimicrobial-soaps-under-different-test-conditions/.

20-Second Hand-Washing Rule Comes From These 2 Studies The 20-Second Hand-Washing Rule Comes From These 2 Studies

Reddy, S. C., et al. (2013). Computer vision syndrome: A study of knowledge and practices in university students. Nepalese Journal of Ophthalmology, 5(2), 161–168 Judging a distance of 20 feet can be difficult. But looking at an object more than 20 feet away works just as well. When in doubt, aim for a longer distance rather than a shorter one. Adjust the screen’s contrast and brightness: Change settings so that the screen is just bright enough to read the text without straining. The right contrast may change depending on the presence of sunlight. A second is a unit of time. The symbol for second is s or sec. There are 60 seconds in a minute. What is a minute (min)?Spending long periods looking at a screen can strain the eyes. Using the 20-20-20 rule can help to prevent this problem. For every 20 minutes a person looks at a screen, they should look at something 20 feet away for 20 seconds.

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Reduce screen glare: Protective anti-glare screens can be applied to computers, phones, tablets, and eyeglasses, to prevent eye problems. Also, flat screens tend to have less glare than curved ones.Use a humidifier: Increasing humidity in a room that is too dry can improve dry eye symptoms. This can be done using a humidifier. Little scientific research has tested the effectiveness of the 20-20-20 rule, but both the American Optometric Association (AOA) and the American Academy of Ophthalmology (AAO) recommend it as a way to reduce eye strain. In a small 2020 study, a group of patients at a university eye clinic were advised to follow 20-20-20 instructions. Twenty days later, self-reports showed no change in computer eye strain symptoms. But results of a clinical test, “tear break-up time,” indicated a significant reduction in dry eye. Medical News Today has strict sourcing guidelines and draws only from peer-reviewed studies, academic research institutions, and medical journals and associations. We avoid using tertiary references. We link primary sources — including studies, scientific references, and statistics — within each article and also list them in the resources section at the bottom of our articles. You can learn more about how we ensure our content is accurate and current by reading our editorial policy. SEC Form 20-F is an annual report filing for non-U.S. and non-Canadian companies that have securities trading in the U.S.

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Investopedia requires writers to use primary sources to support their work. These include white papers, government data, original reporting, and interviews with industry experts. We also reference original research from other reputable publishers where appropriate. You can learn more about the standards we follow in producing accurate, unbiased content in our For practical purposes we can round our final result to an approximate numerical value. We can say that twenty seconds is approximately zero point three three three minutes: Next, let's look at an example showing the work and calculations that are involved in converting from seconds to minutes (s to min). Second to Minute Conversion Example Task: Convert 180 seconds to minutes (show work) Formula:Look out a window during the 20-second breaks, if there is one nearby. It may be easier to find a distant object outdoors. We can also convert by utilizing the inverse value of the conversion factor. In this case 1 minute is equal to 3 × 20 seconds. Jensen, D. (2012) Efficacy of handwashing duration and drying methods. International Association for Food Protection, https://iafp.confex.com/iafp/2012/webprogram/Paper2281.html. Make sure you're getting those soapy seconds in. It'll help keep you and the folks closest to you illness-free. Washing your hands for at least 20 seconds is the most effective way to ensure your hands aren’t spreading pathogens," says family physician Dr. Natasha Bhuyan, MD. "This is in two ways: it helps both wash away dirt and grime and germs, but also helps kill pathogens."