For the elderly, the chance of cataracts increases with age. Early cataracts mainly manifest as blurred vision and abnormal color vision, mainly in the following aspects: 1. Blurred vision, gradual blurring of vision, sometimes feeling that there is an aperture around the light as well as the color of objects is not bright enough. If cataract patients are driving at night, they may feel uncomfortable or irritated by the headlights of cars coming from the opposite direction. However, generally speaking, the development of early cataract symptoms is quite slow and depends on the location of the most cloudy lens and its development process. 2. Color vision abnormalities Color vision abnormalities, the early stage of cataract due to the lens absorbing more water and swelling, its epithelial cell gap increases and filled with particulate water droplets, light will be refracted through it and present colored halo, commonly known as iridescence. At the early stage of cataract, part of the clouding of the lens is located in the pupil area, and a dotted or lamellar shadow with fixed position and constant shape can appear in front of the eyes. It is different from the flying mosquito caused by vitreous opacity, the latter’s dark shadow is movable, although the range of activity is not large, but it is sometimes hidden and variable in shape. 4, day blindness or night blindness Day blindness or night blindness, if the lens clouding first in the central part of the beginning, day light, pupil narrowing, light into the eye is blocked, thus appearing day blindness; such as lens clouding is located in the peripheral part, dark light into the equatorial part of the retina at night is blocked, and the equatorial part of the retina rod optic cells are specialized in liquid vision, and thus will appear liquid blindness, which is also one of the early symptoms of cataract. 5.Eye presbyopia reduction Eye presbyopia reduction, some elderly people usually need to wear presbyopic glasses to read books and newspapers, but they will suddenly find that they do not need to wear presbyopic glasses to see clearly, some elderly people are very happy, in fact, this is not a good sign, this is because of the initial onset of cataract, the lens convexity increased, refractive near point change, is one of the early symptoms of cataract. It is best to go to the hospital eye examination when the above situation occurs to detect the problem in time!