In the unit development work for a long time, the eyes are painful, afraid of light, can't open your eyes, cry. But I always thought this was because the 15-inch display was made. However, I finally found that the culprit caused these pains. It is the light of the office. The sungling tube in the room in the shed. They are all strobe lights. 50 Hz / second. There are still a few that they have broken. Also keep flashing. The reason is found. So how do you solve it. Buy an eye-catching light. So, yesterday
