Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
Doctors are now using surgery to preserve （ ） in many people with a certain disease who would otherwise go blind. (eye, sight)
【正确答案】：EYESIGHT
【题目解析】：
本题考查复合词。
由preserve（动词）可知，空缺处应填名词作宾语，eye和sight可以构成复合名词eyesight意为“视力”，此处指“保护视力”。
句意：医生们正在通过手术来保护那些由于遭受一定疾病而可能失明的人的视力。