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The number of people with vision problems is growing rapidly. According to forecasts, in the near future, about 2,5 billion inhabitants of the Earth will need vision correction with glasses or contact lenses. According to statistics, only 20% of such patients prefer lenses to glasses. To a large extent, numerous misconceptions about contact lenses are “guilty” of this.
1. The use of lenses reduces visual acuity
There is an opinion: wearing contact lenses causes excessive tension in the eye muscles, which eventually adversely affects visual acuity. This is not true. Properly selected lenses are comfortable and do not strain the muscles of the eyes. The owner quickly gets used to them and practically does not notice them. No signs of a decrease in visual acuity in people who use lenses for a long time have been identified.
2. The lens may fall out of the eye
The ability of a lens to stay on the surface of the eyeball depends on the diameter and degree of rigidity. Today's soft lenses are extremely flexible, conform to the shape of the cornea and stay moist for a long time, ensuring perfect contact with the surface. The risk that they pop out of the eye with a sharp movement is extremely small.
It happens that the lens shifts slightly when worn. However, firstly, such cases are rare, and secondly, the problem is easily solved: it is enough to blink several times for the lens to snap into place.
Some people are sure that she can "crawl" inside the eyeball. This is an extremely common misconception that has nothing to do with reality. The anatomical structure of the eye is such that the displacement of the lens to the back of the eyeball is completely excluded.
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3. Lenses limit oxygen access to the eyes
Lenses of the latest generations are made from materials that do not interfere with the air exchange of the cornea. The parameters of each lens describe the so-called oxygen permeability coefficient, which characterizes the amount of oxygen that it passes during the day. In addition, when choosing lenses, the doctor takes into account the characteristics of the patient's body and the mode of use (only daytime or round-the-clock). With the correct use of lenses, the eyes do not suffer from a lack of oxygen.
Much depends on the care of contact lenses. Any contamination reduces both the access of oxygen to the cornea and the corrective ability. Therefore, the owner must strictly follow the recommendations for storage, cleaning and timely replacement of lenses.
4. Lens care is complicated
Cleaning your lenses is easy and only takes a few minutes a day. However, it is important to follow the rules:
- you need to clean the lenses only with special solutions, tap or bottled drinking water is not suitable for this;
- store lenses (for example, at night) in a container filled with liquid, which is designed specifically for this purpose. After removing the lenses, the solution must be poured out, and for the next storage period, replaced with fresh;
- swimming in natural reservoirs or in the pool in reusable lenses is not worth it. Molecules of salts and particles of organic matter contained in the water settle on their surface, which are very difficult to wash off. For swimming, it is better to use disposable lenses;
- Each pair of contact lenses has a certain expiration date, after which they cannot be worn.
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5. When wearing lenses, it is forbidden to use cosmetics
Contact vision correction is not an obstacle to the use of decorative cosmetics, but it is necessary to apply mascara to the eyelashes and eyeliner after the lenses are in place. If paint gets on the surface of the lens, the latter must be removed and rinsed.
Remove makeup in the evening only after the lenses are removed from the eyes and placed in a container.
6. Lenses can only be used for poor vision
In addition to corrective contact lenses (including colored ones), there are decorative options designed for people with 100% vision. However, the wrong choice of decorative lenses is fraught with health problems, so it is advisable to consult a doctor before buying them.
7. Lenses Correct Your Vision Worse Than Glasses
In fact, everything is exactly the opposite. Unlike glasses, contact lenses correct vision by being placed directly on the surface of the eye, which ensures optimal results. In addition, the lenses do not limit the field of view, as they rotate with the eyeball.
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8. Lenses should not be worn with astigmatism
This statement was true several decades ago. Modern contact lenses are made using a special technology that ensures their accelerated stabilization when blinking. Therefore, they can also be used for astigmatism.
Modern lenses are also suitable for patients with presbyopia (if different corrections are needed for near and far vision). For them, multifocal lenses have been developed to effectively cope with the problem.
9. The safest lenses are those that contain the most water
Today's contact lenses are made from silicone hydrogel, which contains less water than the materials used to make lenses of previous generations. Despite this, the latest models pass much more oxygen, are safer and have significantly higher consumer qualities.
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10. Wearing lenses is contraindicated for children
Contact vision correction has practically no age restrictions. Children can wear lenses from the age when they are able to learn the necessary hygiene skills for this. Examination of children over 10 years old, who constantly use such devices, did not reveal any negative consequences. Many experts believe that shatterproof contact lenses are preferable to glasses for teenagers who lead an active lifestyle (for example, playing sports).
11. Lenses protect eyes from ultraviolet light
Some models of contact lenses are labeled UV and are positioned by manufacturers as sunscreen. Unfortunately, this is just advertising. Such devices cannot completely protect the eyes from ultraviolet radiation.
12. Contact lenses are very expensive
The range of contact lenses offered today is very wide. The cost depends on the type, material and a number of other parameters. It is always possible to choose the most affordable lenses from those recommended by a specialist.
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There are a number of pathologies in which contact vision correction is contraindicated. Among them are some types of strabismus, mental disorders, certain anatomical features of the structure of the eyes, uncompensated glaucoma, bronchial asthma, etc.
There are situations in which the use of contact lenses is recommended to be temporarily stopped (for viral infections, parasitic (tick-borne) lesions of the eyelash follicles, etc).
Caution should be taken with contact correction in case of allergy to lens material or components of cleaning solutions. If discomfort occurs, you should immediately contact an ophthalmologist.
Source: neboleem.net
