Wearing glasses is one of the most commonly used ways to correct myopia, many daily glasses friends often have the following experience: when looking in the mirror, you will find that your glasses are high and low; Take off the glasses and close them to find that the two mirror legs are not at the same Angle; After pulling my glasses straight with my bare hands, I soon wore them crooked again...

However, just with good glasses when clearly good, how to wear wearing crooked? Is it your eyes or your face? You know, often wearing crooked glasses not only affects the appearance of beauty but also deepens the degree, the more you wear the higher the degree!

■ How to wear glasses when wearing crooked?

People usually wear glasses, which belong to frame glasses, is the most common optical correction tool in daily life, which can correct the refractive errors of the eyes, and modern people use it as a decoration.

A pair of frame glasses usually include spectacle frame and eyeglasses, spectacle frame according to the style and structure can be divided into full-frame frame, half frame frame, frameless frame, etc., generally composed of these parts:

Leg - usually fitted with an ear hook at the end, attached to the ear to hold the glasses in place;

The bridge of the nose - connects the left and right mirror rings so that the glasses are supported on the nose;

Nose pad - Some glasses rely on a nose pad on the rim of the lens to support the nose;

Hinge - connects the mirror leg to the mirror ring, which is easier to deform or damage.

Knowing the structure of glasses, let's talk about how glasses get crooked.

First of all, wearing glasses with one hand is the main cause of crooked glasses. Between the mirror ring and the mirror leg is connected through the hinge, if the frequent use of one hand, the mirror leg and the hinge pull outward, it is easy to loosen the screws on one side of the hinge due to the uneven force on both sides, resulting in a high and low mirror leg or a tight and loose, resulting in crooked glasses.

In addition, it may not be obvious to you, but in fact, everyone's face is not perfectly symmetrical. Some people also have a difference in the height of the two ears, which is called "high and low ears".

If the glasses ordered from the Internet or the glasses agency is not professional, and their own ears are high and low, the glasses may become crooked. Professional opticians in the optician will generally fine-tune again, so that the glasses more fit their face, through reasonable adjustment, generally can make the glasses look level, and comfortable to wear.

Of course, sometimes the problem of the glasses themselves is also one of the reasons for their distortion. For example, the material of the frame is soft, the hardness is not enough, or the problems in the processing of the glasses lead to the reverse plastic force of the lens on the mirror ring is too large; Long-term failure to clean glasses, frequent opening and closing of mirror legs, accumulation of grease and dust leading to the loss of hinges and nose brackets, may lead to crooked glasses.

There is a final situation, that is, external force, such as broken, crushed glasses caused by deformation. Usually after taking off the glasses, if possible, try to put it in the glasses box, or put it in a safe position to avoid damage to the glasses.

■ What is the harm of wearing crooked glasses for a long time?

The degree of the lens, especially in highly astigmatic glasses, is not the same in every Angle. If the glasses are crooked, the external light can not reach the pupil through the optical center of the lens, which will lead to the horizontal shift of the pupil distance and the axial shift of astigmatism, and the degree of the lens through which you usually see things is not consistent with the actual degree of your own.

Wearing glasses that do not match their own degree for a long time may cause myopia to deepen faster. In particular, many parents choose functional lenses in order to protect their children's vision, such as full-focus lenses, multi-focus lenses, etc. This kind of functional lens also needs to record the height of the monocular pupil of the optometer, and needs to ensure the correct posture when wearing, otherwise it will not only not play a role in protecting vision, but also speed up the development of myopia.

In addition, crooked glasses will produce a certain prism effect, so that the things seen deformation, add attention to fatigue. There are also some people because they can not adapt to the mismatched glasses, long-term wear may also appear dizziness, nausea and other symptoms.

In daily life, how do we tell if our glasses are crooked?

A pair of suitable glasses, the two sides of the mirror rings should be horizontal, the left and right mirror rings on the upper edge of the eyelid equal distance, the eye is roughly in the glasses between 1/3 to 1/2, the distance between the lens and the eye is about 12 mm, and the lens can not contact the eyelashes, the side of the lens about 8-15 degrees forward Angle. The nose bracket and mirror legs on both sides fit comfortably with the face, without clamping or loosening.

How to self-test? First of all, take off the glasses, face up on the horizontal surface, observe whether the opening and closing of the two mirror legs are symmetrical, the lower edges of the two lenses and the two ear hooks are stable; Then turn the glasses upside down, whether the two mirror legs are in line with the table; Then close the glasses and see if the left and right mirror legs can form a straight line.