The 64-year-old teacher Chen was myopic when he was young, three hundred degrees of myopia glasses worn for twenty years. But in the past few years, the glasses suddenly unclear, the year before last to the optician’s examination, into four hundred degrees, wear not long again, and then examination into more than five hundred degrees, corrected visual acuity has also dropped 2 lines. “How to get older suddenly myopia aggravated, will it keep growing ah?” Mr. Chen was anxious to go to the hospital for a closer examination, and the result was diagnosed as nuclear cataract. Cataract is one of the most common age-related eye diseases, and everyone knows that having cataract vision will affect vision. However, because the form and development of cataracts are highly variable, the performance of the effects of degenerative vision function may also be different for each person. In normal eyes, black and white are relatively distinct, but with cataracts, many people will feel that white is not white and black is not black, and it seems to be a gray world, just like a “foggy day”. Some people will feel that the color of things is not as vivid as before, whether they look far or close, they will feel a blurred feeling, the contrast is reduced, they can’t see things clearly at night, they can’t see things clearly in the sun, they can’t see things clearly when they look closer, they can’t see clearly when they put on and take off their glasses. There are also many people like Ms. Chen who experience sudden deepening and worsening of myopia. Nuclear cataract is also a kind of senile cataract, accounting for about 20-25% of senile cataract. In the process of cataract formation and aging, the color of the lens becomes yellow and deepens, and the density increases, just like the thickening of a camera lens, and the focal length changes accordingly. The refractive interstitium of the eye will change, causing the focus of light in the patient’s eye to shift forward and showing symptoms of progressive myopia. If an elderly person has no myopia in the past, he or she may feel that he or she does not need aging glasses anymore, and it is not clear to watch TV slowly, but it is easier to read the newspaper, as if his or her eyes are not so old.