Knowledge

How do teenagers develop myopia?

How does the human eye grow and develop? At birth, human eyes are immature and still need to be perfected continuously. At birth, the eyes are in a state of hyperopia. With growth

What is myopia lens? Concave lens or convex lens?

The main symptom of myopia is that you can't see things far away. The function of myopia glasses is to correct vision and maintain the adjustment ability of ciliary muscle of the e

What is the relationship between myopia and astigmatism?

Myopia is caused by the lengthening of the axial length of the eye, which prevents light from being accurately focused on the retina, while astigmatism is caused by the unevenness

The difference of refractive index brings different visual effects

1.56 and 1.61 refer to the refractive index of the lens. Generally, when selecting the lens in the matching, we will see the refractive index of different lenses, and these refract

How can students prevent and delay the growth of myopia?

Many children use electronic products such as mobile phones and computers for a long time, coupled with bad habits such as insufficient outdoor exercise, irregular work and rest sc

The importance of anti fog lens in winter

People wearing glasses have the following experiences in winter It was cold. I wanted to keep warm when I put on the mask, but when I put on the mask and the lens fogged, I was

If you choose the right glasses, there are no ugly people.

The round face is characterized by round cheeks, arched forehead, wide, round chin and a sense of middle circle on the whole. So many round lines require glasses with sharp edges a

How to properly protect your eyesight?

The main symptoms of myopia 1 Decreased vision, the most prominent symptom of myopia is the inability to see distant objects, but can see clearly at close range; 2 Asthe

How should glasses wear after all just right?

Nowadays, more and more people wear glasses. But most people don't know how and when to wear glasses. Many parents reflect that their children only wear glasses in class, how shoul

Damage of electronic products to eyes

Electronic products occupy a very important position in people's life. Whether mobile phones or computers, they are indispensable partners in life. No matter in work or in daily li

How does visual fatigue come about?

The causes of eye fatigue can be roughly divided into three types. The first is symptomatic, which is the so-called functional sub-health state, which is mainly the problem of the

What causes astigmatism?

Astigmatism, generally speaking, is mostly caused by congenital abnormal changes in the cornea, while acquired factors, such as poor long-term eye posture: lying reading, lying dow