Salem Lutheran School Weather Forecast 7 day Outlook Light rain Monday, temperatures as high as 44Â°F / 7Â°C, low temperature around 39Â°F / 4Â°C, probability of precipitation 89%, wind out of the ESE 8 mph / 13 km/h.
Actually, the rule of thumb is to align your eyes (straight ahead) to about 3/4 up the height of viewable area of the screen. That is, about 1/4 of the screen is above eye-level, the rest is below and this should apply to any reasonable screen size.
Normal vision is commonly referred to as 20/20 to describe the eye's focusing ability at a distance of 20 ft from an object. For example, 20/50 means that a myopic person must stand 20 ft away from an eye chart to see what a normal person can see at 50 ft. The larger the bottom number, the greater the myopia.