Taking frequent breaks to look at faraway objects during screen time significantly lessened their eye strain symptoms. Almost 90 percent of the 795 students had symptoms of CVS after just two continuous hours of computer usage. In a study published by the Nepalese Journal of Ophthalmology, researchers examined computer use and its effects on the eyes of university students in Malaysia. It’s called computer vision syndrome (CVS). ![]() That can lead to dry, irritated, and tired eyes.Įye strain caused by screens has its own name. When staring at screens, this number decreases to a half or third that often. ![]() Humans normally blink around 15 times each minute. But it can cause strain and unpleasant symptoms. The American Academy of Ophthalmology explains that looking at digital devices won’t necessarily damage your eyesight. Just click start when you begin your screen time, and the app will remind you to take a break. There are also free apps like Eye Care 20 20 20 that can help. Setting a timed reminder to pop up can help you take a break every 20 minutes. You probably get absorbed in reading or work when you’re looking at screens. What about reminding yourself to do this every 20 minutes? That’s because green tea contains antioxidants called catechins that may help your eyes produce tears for better lubrication. If your body is hydrated, your eyes will be as well.ĭrinking green tea during your break may help even more. While you’re resting your eyes, it’s also a good idea to get up and grab a drink of water to keep yourself hydrated. ![]() It takes about 20 seconds for your eyes to completely relax. If you work in a small space, try walking outdoors or into a larger area where you can rest your eyes. Consider looking out a window at an object that seems far away, like a tree or a building across the street. You should just try to focus on something far away from you. Unless you have a tape measure you probably won’t be able to accurately measure 20 feet. How can you tell if something is 20 feet away? Basically, every 20 minutes spent using a screen, you should try to look away at something that is 20 feet away from you for a total of 20 seconds. ![]() This is different than running a standard 1 second sleep loop, due to sleeping longer does not consume as much CPU.If you find yourself gazing at screens all day, your eye doctor may have mentioned this rule to you. This is not a replacement for multi-threading, but it could help someone that wants to do something cheap. Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto searchĪn example of using sleep to run a set of functions at different intervals.
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