Unit1UnitReviewⅠ
阅读理解A(2013·福州高一检测Whenweseewell,wedonotthinkaboutoureyesveryoften
Itisonlywhenwecannotseeperfectlythatwerealizehowimportantoureyesare
Peoplewhoarenear-sightedcanonlyseethingsthatareveryclosetotheireyes
Everythingelseseemsblurry
Manypeoplewhodoalotofwork,suchaswriting,readingandsewingbecomenear-sighted
However,peoplewhoarefar-sightedsufferfromjusttheoppositeproblem
Theycanseethingsthatarefaraway,buttheyhavedifficultyinreadingabookunlesstheyholditatarm’slength
Iftheywanttodomuchreading,theymustgetglasses,too
Otherpeopledonotseeclearlybecausetheireyesarenotexactlytherightshape
Theyhavewhatiscalledastigmatism(散光)
This,too,canbecorrectedbyglasses
Somepeople’seyesbecomecloudybecauseofcataracts(白内障)
Longagothesepeopleoftenbecameblind
Now,however,itispossibletooperateonthecataracts