Why do people get hyperopia?

summary

Hyperopia is because the optical focus of this eye is behind the retina, so the image formed on the retina is blurred. In order to see the distant objects, we need to use the adjusting force to move the focus behind the retina to the retina, so the hyperopia is often in the adjusting state, which is prone to eye fatigue.. Why do people get hyperopia? Let's talk about it

Why do people get hyperopia?

Hyperopia is the most common axial hyperopia, that is, the anterior axis of the eye is short. This is a refractive anomaly. In the main axis, the average is about 17.3 mm. From the angle of the length of the eye axis, almost all of them are hyperopia. In infants, hyperopia is physiological, so to speak. After that, as the baby's body develops, the front axle of the eye grows slowly and remains until adulthood, when the eye should be at or near the surface of the face.

Generally speaking, the axial length of human presbyopia is not very short, rarely more than 2 mm. According to the optical calculation of eye curvature, every 1 mm shortening represents a change of about 3 days, and hyperopia over 6 days is rare. But also very far sighted, some people's eyes, although not combined with other lesions, will also be up to 24 days. Pathological hair, abnormal clothing, such as small eyes, hyperopia degree even more than 24 days.

In the process of eye development of some people, due to the internal influence (heredity) and external environment, the eye stops developing and cannot reach the normal axial length. Therefore, the axial length of adults or infants is called axial visionary.

matters needing attention

1. Drink enough water to prevent dry eyes. 2. Protect your eyes when doing dangerous work, such as knocking on metal objects, using corrosive chemicals, etc. 3. Food rich in vitamin A and vitamin C. 4. Wear sunglasses when working or walking outdoors to prevent excessive ultraviolet radiation.