Nowadays, the explosion of electronic products, almost a handful of cell phones, you can often see the streets and alleys or on the subway and bus people can not turn their eyes on the phone to play, or read a book, read the news, or watch a movie, a few minutes, a few hours. There are also many friends like to read novels at night with the phone open in the nest. Then look at the phone screen will not cause harm to the human eye? 1, easy to get conjunctivitis: long time to play cell phones, whether on the bumpy road look down, or at home sitting, will be a threat to the conjunctiva of the eyes. Because of the long time to maintain a fixed low posture, it is easy to make the blood flow to the eyes, resulting in mild congestion of the root conjunctival vessels, the lid conjunctiva is also prone to mild papillary hyperplasia and the formation of follicles, etc.. At first, the skin of the canthus (corner of the eye) may be flushed, moist, and crusty, but if left unattended, chronic inflammatory lesions of the conjunctival tissue may be induced, resulting in chronic conjunctivitis. 2, easy to cause visual fatigue: long time eye itself is easy to cause visual fatigue, concentrating on the cell phone screen, the screen constantly changing light and shadow will cause continuous stimulation of the eyes, when the eyes keep capturing these light and shadow, it will make the eyes especially fatigue. Especially when the surrounding environment is dark, and the cell phone screen is bright, the damage to the eye is particularly large, often times in the past will lead to vision loss, myopia deepening and other problems. 3, prone to dry eye: “dry eye” the term should not be too unfamiliar, look at the phone screen for a long time will make the natural number of blinks greatly reduced, the surface of the black eye tear film layer damage, thus aggravating eye fatigue and dryness, itching and other feelings, and even make the eyes have stinging, tears, photophobia and other uncomfortable symptoms appear. Dry eye syndrome occurs.