What symptom is cataract?

summary

All kinds of reasons, such as aging, genetic, local nutritional disorders, immune and metabolic abnormalities, trauma, poisoning, radiation, etc., can cause lens metabolic disorders, leading to lens protein degeneration and turbidity, which is called cataract. What are the symptoms of cataract? Next, I'd like to share my views with you.

What symptom is cataract?

First, the density of lens opacity increased from the center of lens, i.e. the nucleus of embryo, and gradually increased and slowly expanded to the periphery. In the early stage, it was light yellow. With the aggravation of opacity, the color gradually deepened, such as dark yellow and dark brown yellow. The density of nucleus increased and the refractive index increased,

Second: patients often complain that presbyopia is reduced or myopia is increased, and the peripheral cortex is still transparent in the early stage. Therefore, in the dark, the pupil dilates and the vision is improved, while in the strong light, the pupil shrinks and the vision is reduced. Therefore, surgery is usually performed without waiting for the cortex to be completely turbid.

Thirdly, the development process of the crystal cortex can be divided into four stages: initial stage, immature stage, mature stage and over mature stage. Opacity is located in the subcapsular cortex of the lens. If it is located in the optic axis area, the vision will be affected in the early stage.

matters needing attention

1: Eat more foods that contain lutein, such as carrots, spinach and pepper. 2: Eat foods rich in vitamin C, such as tomatoes, Chinese cabbage, onions, etc. 3: Eat more selenium rich food, such as shrimp, nuts and so on. 4: Drink more tea, mainly green tea. 5: Eat more zinc containing food, such as pineapple, coarse grain, eggplant, etc.