This type of eye fatigue or eye strain is sometimes known as computer vision syndrome. It affects about 50%-90% of computer workers. Some estimates say computer-related eye symptoms may be responsible for up to 10 million primary care eye examinations each year.
MAST MOUNTED PREAMPLIFIERS. Chapter Eight-TV ANTENNA-MOUNTED AMPLIFIERS. A mast or TV antenna-mounted amplifier (preamp) is used primarily to eliminate snow on the TV screen.Snow is actually electrical noise that is generated by the TV receiver and other electrical devices.he preamp itself is mounted on the TV antenna boom or on the mast as close to the TV antenna as possible. The power supply unit is mounted indoors. Power is supplied to the preamp unit through the transmission line.
Your mom telling you âyouâll hurt your eyes if you sit too close to the tvâ or my favorite âeat your carrots for better visionâ. Well, I think itâs time to get to the bottom of all these vision myths and get some vision facts once and for all! Myth: If you sit too close to the tv youâll hurt your eyes. Fact: The truth is if you need to sit close to the tv to clearly see what is going on you may already have vision problems. Sitting close to any object to see it better is a symptom of nearsightedness and you should talk with your doctor.