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.
1 With or without vision corrections, each eye, as well as both eyes combined, need to have 20/40 vision. 2  Ability to distinguish color is necessary. 3  Hearing needs to be good enough to notice a forced whisper at a minimum distance of 5 feet.  Maximum allowable blood pressure is 160/100.