What is astigmatism

summary

Now there are more and more high-tech products, which lead to more problems in people's eyes. Next, I will explain what kind of disease astigmatism is.

What is astigmatism

First of all, reflective eye disease is due to changes in the curvature of people's cornea, resulting in some changes when light is put into the eye.

Secondly, the two main symptoms of astigmatism are decreased vision and visual fatigue. If you are an emmetropic eye, use a - 2.0dc lens and place the axis of the lens vertically in front of your eyes, it will become a + 2.0dc × 90 ° normal simple hyperopia astigmatism. All light entering the eyeball vertically is still focused on the retina, and all light entering the eyeball horizontally is focused on the back of the retina. Fig. 2. Fig. 3 is a schematic diagram of an image viewed by an astigmatic eye. Wearing the astigmatism lens above, when you look at the two black spots in front of you, you can see the two black spots as two light black spots with fuzzy tails on both sides. Figure 3B.

Finally, astigmatism correction method, mainly wearing glasses, astigmatism glasses at a certain angle will have a special radian, to correct the patient's eyes at the angle of astigmatism; contact lenses or laser correction surgery can also correct astigmatism.

matters needing attention

When astigmatism is an eye disease, you must pay attention to your work and rest time. Don't face the computer for a long time. This will cause certain damage to your eyes and aggravate astigmatism. You should pay more attention to eating some green vegetables.