![]() Q27 : The combination of North America and Eurasia had the name_ ” help us realize the answers B, C and D are incorrect. Nothing, it seems, can match the simple convenience of putting on a pair of glasses. The word " straightforward” and t he text “… traditional lenses remain as popular as ever. ” which indicates that “laser eye surgery ” has limited advantages. In fact, besides benefits ( straightforward, safe and affordable ), laser eye surgery “ remains a small risk of failure and resultant vision problems. We can make the mistake when seeing the text “… provide long-term corrective benefits …” and ignore the answer A because we easily think that “long-term benefits ” has the opposite meaning with “ limited benefits ”. The content of “ laser eye surgery ” is mentioned in the last paragraph. It is an interesting fact, that, despite the growth of such surgery, and the use of contacts, traditional lenses remain as popular as ever. Although straightforward enough and increasingly safe and affordable, given the delicacy of the eye, there remains a small risk of failure and resultant vision problems, such as ghosting or halos. In this process, laser beams are used, usually to alter the curvature of the cornea and thus provide long-term corrective benefits. ![]() The lace of the future may well be ‘ laser eye surgery’. Besides, the text “… the ability to screen out harmful ultraviolet and infrared rays from the sun ” implies that modern lens are safer. So, C and D cannot be the correct answer.Īfter eliminating the wrong answers, we can guess the best answer is A. However, these attributes are of frames, not of modern lens. In addition, attributes “ flexible ” and “ lightweight ” (soft) are mentioned in the text. Similarly, the frames are flexible and lightweight, offering less friction and irritation for the skin… ” indicates us that modern lenses are lower weigh. The text: “ These days, lenses are most commonly a plastic polycarbonate material, offering lower weight and higher scratch resistance, as well as the ability to screen out harmful ultraviolet and infrared rays from the sun. Similarly, the frames are flexible and lightweight, offering less friction and irritation for the skin… These days, lenses are most commonly a plastic polycarbonate material, offering lower weight and higher scratch resistance, as well as the ability to screen out harmful ultraviolet and infrared rays from the sun.
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