Our Eyes Also Need to Keep Wet
In the surface of our eyes, there is a thin tear velum which has the function of lubrication. When you blink, the thin tear velum will refurbish and keep our eyes wetness.
For some people, they don’t know many things about their eyes, even though they are myopic; of course, they don’t know that they ought to keep their eyes in the condition of wetness. Therefore, when their eye hurt, they don’t know why. In this rapid development time, there are many things for us to use our eyes, especially when we use a computer, watch a TV program or play PSP; we have to put all our attention on it. Now and then you are so focused in it that we don’t know what has happened around us. However, this is quite bad for our eyes. That’s because ten seconds later after our eyes focus on one thing, there will be a dry dot appearing on our tear velum. As a result, the surface of our eyeballs will become drier and drier. It’s likely that we won’t have much feeling at first; while not long later we are able to feel that our eyes are quite dry.
The best way for us to use our eyes to let them have a rest after a certain time we use them until they become wet again. Normally, our eyes will blink about 15 times every minute. However, when we focus on reading or using computers, it’s likely that we only will blink no more than 10 times every minute. As a result, our tear velum become smaller and smaller. Since it become small, then the function of keeping our eyes wet will become weak or even lose. So our eyeballs become quite dry; and then when we close or open our eyes, our cornea and eyelid are easy to brush burn. It may results the dryness of our eyes, the tiredness of our eyes, inflammation and ache. At last, we are going to suffer from xeroma, one of eye diseases. Considering that we are already a nearsighted sufferer, we have to let our eyes get enough rest when we are using computer or watching TV programs. Otherwise, our strength will be worse and worse.
Therefore, we can see that it’s important to protect our eyes. After all, each of us only has one pair of eyes. We ought to pay much attention to the health protection of our eyes. Although for some of us it’s impossible not to use computers in our daily life due to this or that reason; it’s possible that we let our eyes have enough rest after a certain time we use them. Thereby, our eyes won’t become worse and worse. What’s more, when our eyes are in a good condition, the efficiency for us to do our work is quite high. Keeping our eyes wet, we are able to have an excellent day every day.
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