Why are contact lenses always uncomfortable?

How to choose to wear contact lenses? What issues should be paid attention to?

These people are not suitable for wearing contact lenses

Contact lenses are not suitable for everyone. The following categories of people are not suitable for wearing:

First, patients with poor eye health conditions, such as high intraocular pressure, severe dry eye, infectious conjunctivitis, or patients with systemic diseases such as diabetes, are not suitable for wearing contact lenses;

Second, people who have poor compliance, do not pay attention to personal hygiene, and cannot consciously check their eye conditions regularly;

Third, people with allergies, especially those who are allergic to lens materials and care product ingredients;

Fourth, people who often face wind, sand and volatile chemicals in their life and work environments, wearing contact lenses may increase the probability of eye damage.

In addition, middle and high school students who are still in development can also wear contact lenses, such as OK lenses, which are specially designed hard contact lenses with high oxygen permeability. Doctors will guide young people to wear them to control the development of myopia. There are also some teenagers who are not suitable for wearing glasses due to the large difference in refractive status of the eyes, and can choose contact lenses. But it should be noted that, try not to wear cosmetic contact lenses, because the oxygen permeability of cosmetic contact lenses is relatively poor, and the quality of cosmetic contact lenses on the market is uneven, and it is easy to buy substandard products.

Choose the right contact lens, pay attention to the parameters

People who are suitable for wearing contact lenses must choose regular products when buying contact lenses, and they also need to pay attention to the choice of contact lens parameters.

The first is that the degree of contact lens must be accurate. To wear contact lenses, you also need to go to a professional institution for optometry to determine the exact degree. If the degree is not appropriate, long-term wearing may affect your vision health. In the case of astigmatism, if the astigmatism is not high, you can use regular spherical contact lenses, but if the astigmatism is too large, it is best to customize the contact lenses with astigmatism design.

It should be noted that if the power of the frame glasses is known, it is not possible to buy contact lenses directly based on the known power. Because the frame glasses are worn on the bridge of the nose, there is a certain distance between them and the cornea, which is called the lens eye distance. The degree of the frame glasses is different from the contact lenses worn directly on the cornea. The degree selection of contact lenses requires the conversion of lens eye distance on the basis of frame lens refraction.

The second is the base curve of the lens. The base curve refers to the radius of curvature of the lens. The size of the base curve is related to the steepness of the inner surface of the lens. The smaller the base curve, the steeper it is, and the tighter it is when worn in the eyes. When the base curve parameters are inappropriate, it will reduce the wearing comfort. Therefore, it is necessary to select the size of the contact lens base curve according to the corneal curvature measurement parameters.

In addition, the two parameters of oxygen permeability and water content cannot be ignored. The better the oxygen permeability, the cornea can "breathe comfortably". Normally, the thinner the lens, the better the oxygen permeability, and the higher the water content of the lens, the higher the oxygen carrying capacity, but because it needs to maintain the moisture of the lens, it will absorb the moisture in the eye, causing the dry eye. Therefore, these two parameters need to be considered at the same time, and different groups of people need to weigh their own situation and make choices under the guidance of professional physicians.

Finally, from the perspective of comfort and safety, the shorter the abandonment cycle is, the cleaner is relatively cleaner, and the chance of causing eye infections is lower.

Daily care can't be sloppy

If you choose the right contact lens, you should pay attention to the care when you wear it:

First, daily utensils such as contact lens cases and wearing tools need to be disinfected and replaced regularly. Pay attention to clean hands when wearing and removing them;

Second, you must take off your contact lenses during swimming, bathing, and sleeping, otherwise it may bring the risk of infection to your eyes. In addition, after taking off the glasses, use the nursing solution for soaking and disinfection in time;

Third, try not to wear it for more than 8 hours at a time, and at the same time, pay attention to discarding the cycle, do not let the lens serve for an extended period of time, and replace it regularly;

Fourth, if you have symptoms such as dry eyes, you can use artificial tears without preservatives. If the discomfort is serious, you need to take them out and seek medical treatment in time;

Fifth, remember to go to the hospital to check your eye health regularly.