Sweet desserts can contribute to the development of myopia. Because the metabolism of sugar in the human body requires a large amount of vitamin B1 and reduces the calcium content in the body, it weakens the elasticity of the eyeball wall and promotes the deepening of myopia. Therefore, excessive sweets are not good for myopia patients. Avoid cold drinks before and after mealsDrinking cold drinks before meals causes the gastrointestinal capillaries to contract due to the cold stimulation, affecting the secretion of digestive glands and making the digestive process incomplete. Over time, this will affect the digestive function. In addition, cold drinks contain a large amount of sucrose and milk, a small amount of cream and water, and starch is also added during production. Drinking cold drinks before meals increases blood sugar and then reduces appetite. Drinking cold drinks after meals causes the dilated blood vessels in the stomach to contract, reducing blood flow and hindering the normal digestive process. The cold stimulation speeds up the gastrointestinal motility and reduces the absorption of nutrients in the intestines. Therefore, cold drinks and ice cream should not be eaten before or after meals, and it is more appropriate to eat them between meals. Do not watch TV while eatingWhen a person eats, almost all the digestive organs become active, a large amount of digestive juice is secreted, and blood is also concentrated in the digestive organs. If you watch TV while eating, the brain's activity requires a large supply of blood, which affects the activity of the digestive organs and hinders the digestion of food. On the other hand, because some blood has already flowed into the digestive organs, the blood supply to the brain will be insufficient when watching TV. Over time, you will feel dizzy and dizzy. As a result, you don't watch TV well and you don't eat well. So, don't watch TV while eating. It is not advisable to smoke while eatingSome people have the habit of stopping to smoke during a meal or drinking and then continuing to eat and drink. Some people simply smoke while eating and drinking. Smoking has many harmful effects on health, here we only talk about the harm of smoking during meals. When you smoke while eating, the toxic substances in the smoke will adhere to the mouth and throat, enter the stomach and intestines along with the food, and directly harm the human body. In addition, smoking can also cause taste disorders, inhibit the secretion of digestive glands and reduce the resistance of the digestive tract mucosa. Over time, it will inevitably affect a person's digestive and absorption functions, and even cause gastrointestinal diseases. If you smoke and drink at the same time, the harm to health exceeds that of simple smoking at ordinary times. This is because alcohol can dissolve the toxic substances in cigarettes, including carcinogens, and can be directly absorbed by the liver. Therefore, we advise you not to smoke while eating.