In clinical work, many diabetic patients will have visual impairment, mainly manifested as sometimes very clear, and sometimes blurred vision, why is this? Let me explain to you slowly! In fact, this is mainly the fault of blood sugar, blood sugar by affecting our eye lens adjustment ability to present visual impairment, the lens nutrition from the eye a colorless transparent liquid – atrial water, when blood sugar rises, the atrial water glucose concentration rises, diffusion into the lens, the lens osmotic pressure rises, the lens fibers absorb water swelling, myopia; when blood sugar When blood sugar suddenly decreases, it causes the opposite change in osmolarity, the lens water decreases, and farsightedness occurs. This change in vision reminds you that you should pay attention to the change in blood sugar. At this time, the fluctuation of blood sugar may be too large, so you should adjust your diet and the use of glucose-lowering drugs, but you do not need to get a lens immediately, you should check the fluctuation of vision after the blood sugar is stabilized and then decide whether you need another optometry.