Eyesight plays a very important role in our daily life. Every waking moment, the eyes are working to see the world around us. Over forty percent of Americans worry about losing eyesight, but it's easy to include steps into our daily life to ensure healthy eyes. Here are five suggestions for a lifetime of healthy eyesight:

·Schedule yearly exams. 【小题1】 Experts advise parents to bring babies 6 to 12 months of age to the doctor for a careful check. The good news is that millions of children now can have yearly eye exams and following treatment, including eyeglasses.

·Protect against UV rays (紫外线). Long­term stay in the sun creates risk to your eyes. No matter what the season is, it’s extremely important to wear sunglasses. 【小题2】

·【小题3】 Two thirds of Americans spend up to seven hours a day using computers or other digital products. This frequent eye activity increases the risk for eye tiredness. Experts recommend that people practice the 20/20/20 rule: every 20 minutes, take a 20­second break and look at something 20 feet away.

·【小题4】 As part of a healthy diet, eat more fruits and vegetables each day. Vitamins (维生素) C and E help protect eyesight and promote eye health.

·Practice safe wear and care of contact lenses (隐形眼镜). Many Americans use contact lenses to improve their eyesight. While some follow the medical advice for wearing contact lenses, many are breaking the rules and putting their eyesight at risk. 【小题5】 Otherwise, you may have problems such as red eyes, pain in the eyes, or a more serious condition.

A nosebleed(鼻出血） can be frightening to get or see，but try to stay calm.Most nosebleeds look much worse than they really are.Almost all nosebleeds can be treated at home.

If you get a nosebleed，sit down and lean slightly forward.Keeping your head above your heart will make your nose bleed less.Lean forwards so that the blood will flow out of your nose instead of down the back of your throat.If you lean back，you may swallow the blood.This can make you uncomfortable.

Use your thumb and index fingers to press together the soft part of your nose.Keep holding your nose until the bleeding stops.Don’t let go for at least 5 minutes.If it’s still bleeding after that，hold it again for 10 minutes straight.You can also place an ice pack across the toe of your nose.Once the bleeding stops，don’t do anything that may make it start again，such as bending over or blowing your nose.

The most common causes of nosebleeds are dryness(often caused by indoor heat in the winter)and nose picking.These two things work together—nose picking occurs more often when the liquid in the nose is dry.Other，less common causes include injuries，colds or cocaine use.Children may stick small objects up their nose.Old people may have infections or high blood pressure.The cause of nosebleeds is often unknown.

Most nosebleeds aren’t serious.They occur in the front part of the nose and stop in a few minutes.

A few nosebleeds start in large vessels(血管)in the back of the nose，which can be dangerous.They may occur after an injury.This type of nosebleed is more common in the elderly and is often due to high blood pressure，daily aspirin use or bleeding disorders.

Do you look happy? angry? Have you ever wondered how you know what another person’s mood is just by looking at his or her face? Studies have shown that one instantaneously (瞬间地) and subconsciously makes a determination of another person’s mood just by glancing at the position and appearance of both the eyebrows and mouth. But what if only the position of the eyebrows was varied , and not the mouth? Would you still be able to determine his or her mood or personality just by seeing the eyebrows?

Observe the four faces shown below. Notice how each face has exactly the same shape. the same smile, and the same eyes. The only difference between each of the faces is the position of the eyebrows.

Low, flat eyebrows that hang over the eyes indicate tiredness, while an eyebrow that is highest in the middle denotes sadness. Downward slanting eyebrows show anger, while highly arched eyebrows show happiness.

Frequently, malposition of the eyebrows, such as eyebrow sagging(下垂) and upper eyelid fullness, can be overlooked when considering facial aging and expression. Furthermore, the heavy eyebrow skin pushed the eyelid down causing a tired appearance.

To avoid eyebrow sagging, many people raise their eyebrows to remove the brow and eyelid skin from their visual space. These people eventually develop wrinkles in the forehead due to the constant movement of the muscles that raise the eyebrow. In addition, there are those who are sensitive to light and frequently’ squint(斜视) and squeeze’ their eyes. This effectively pulls the eyebrows down and leads to wrinkles between the eyebrows and at the corners of the eyes.

Botox is an effective measure for fine lines of the forehead and lines between the eyebrows. Botox works by freezing the muscle movement for several months. For the purpose of creating a more pleasant appearance, the best corrective measure is brow-lift surgery.