The 20–20–20 rule: Every 20 minutes, look at something at least 20ft (6.09m) away, for at least like 20 seconds. Computer glasses (to reduce glare and eyestrain): gaming glasses (e.g. the Gunnar tint and coating (http://www.gunnars.com/faq/) can be found at e.g. Best Buy (where they are known to carry e.g…