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Gregory Schwartz,an associate professor at Northwestern University.However,that signal canbe interrupted by genetic and environmental factors,which leads to our eyeballs growing a bittoo much,leading to far-off objects looking out of focus.Signs you might have nearsightednessalso include headaches,as well as eye stress and tiredness when doing certain activities such asdriving or playing sports.The increased use of screens,most of which are high contrast,like black text on a whitepage,or light text on a dark background,overstimulating our eyes,causing more eye growth inchildren and less time spent outdoors are to blame.A 2017 study published in JAMAOphthalmology found a connection between increased natural light exposure and a decrease innearsightedness,particularly in children and young adults.Exposure to natural light stimulatesdopamine,a chemical which helps regulate normal growth and development of the eyeball.Indoor lighting doesn't do the trick.Most people's vision will stabilize in their teens,but some people develop nearsightednesslater in life,typically between ages 20 and 40.Poor eyesight isn't the only downside;peoplewith nearsightedness are at a higher risk of developing eye issues as they age.That's whyregular eye exercise is crucial32.What is the function of the figures in paragraph 1?A.To draw the attention of WHO.B.To introduce the research methods.C.To explain the causes of nearsightedness.D.To illustrate the seriousness of nearsightedness.33.What happens to the eyeballs of nearsighted children?A.They are out of shape.B.They grow into a sphere.C.They match the growth of heads.D.They distinguish far-off objects easily.34.What is the main idea of paragraph 3?A.The overuse of screensB.The causes of nearsightedness.C.The benefits of protecting eyesD.The influence of exposure to light.35.What might the author continue talking about?A.Eye issues of ageingB.The ways to exercise eyes.C.Key factors to affect eyesightD.The downside of nearsightedness.英语试卷第8页（共12页）》