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   An adult usually spends about 11 hours a day looking at the screen of a cell phone，tablet，television，or computer.What all of these screens have in common is that they give off blue light，which some say is bad for our eyes.Now，a new way to keep our eyes bright could be coming soon to stores.
   Blue light has been said to trouble natural sleep cycles and be bad for our eyes.This belief is based on a study made on lab mice.In the study，blue light caused ham for part of the mice's eyes.However，the structure of the human eye is different from that of a mouse's eye.
   New studies show that blue light from phone or computer screens is no more harmful than sunlight，the largest source of blue light.Still，to get a good night's rest，it's best not to view any kinds of bright light two to three hours before bedtime.In addition，looking at screens for too long may cause eyestrain and could lead to a lot of eye disorders and even blindness.
   Scientists now believe they have discovered a deep red light of a specific wavelength that could help to improve vision and protect our eyes as we age.In a recent study，people between the ages of 28 and 72 used a device that shone special red light into their eyes once a day.At the end of the study，the ability to detect colors improved by 20%in those over the age of 40.The best part is that the device used is simple，safe，and only costs around ＄15 to make，so it should be quite affordable when it hits the market.
   As technology and our life become increasingly connected，it is fitting that technology could end up being both the cause of and solution to our vision problems.We can see that!
（1）According to the first paragraph，spending too much time on the screen is bad for our

B

B

.
A．hands
B．eyes
C．backs
D．stomachs
（2）What is TRUE about the study made on lab mice？

A

A

A．Blue light is bad for part of the mice's eyes.
B．Blue light is terribly bad for human eyes.
C．Mice's eyes are used to seeing blue light.
D．Mice's eyes are the same as those of humans.
（3）What gives off the most blue light？

D

D

A．A phone screen.
B．A TV screen.
C．A computer screen.
D．The sun.
（4）How can we describe the device giving off red light in the recent study？

C

C

A．Expensive but helpful.
B．Difficult to use but cheap.
C．Helpful and not expensive.
D．Very big and kind of cheap.
（5）What can we learn from the last paragraph？

B

B

A．We can't stay away from blue light at all.
B．Technology can help deal with vision problems.
C．No one can see the helpful technology come.
D．Technology is difficult to connect with our life.