Contact lenses have many nuances in wearing, you need not only to correctly choose the radius of curvature and power of diopters, but also take into account factors such as personal comfort and sensitivity of the cornea. The higher it is, the longer it can use lenses of planned monthly and half-yearly wearing. Beginners and those whose eyes are sensitive to the presence of a foreign body, it is better to choose a two-week lens.
How to use a two-week lens?
Lenses with the ability to wear for 14 days have a number of advantages:
- For 14 days on the surface of the contact lens accumulates only a small part of the protein and phosphate deposits - the products of the metabolism of the eye. In addition, the surface of the lens does not have time to become more porous, which prevents the risk of bacterial infection.
- The eye gradually adapts to a certain lens, but still does not get tired of it, it does not get used.
- It is possible to use the lens both in day wear mode and in socks mode without removing it.
- Due to the limited period of operation, the lens is as thin as possible and provides excellent oxygen access to the eye. The same factor makes wearing comfortable.
Can I wear two-week lenses longer than the allotted time?
In fact, experts disagree about this issue, but in general there are a number of rules that must be observed. Depending on how you will wear a two-week lens, the length of the wearing period is calculated. The instructions say that the shelf life of the lens is 14 days from the time the package was opened. This is due to the fact that even if you do not wear a lens every day, bacteria still accumulate and multiply on its surface. A special solution is not an obstacle to this process. Therefore, ideally, you should discard the lenses no later than two weeks after the first use. Of course, this rule can be bypassed a little in the event that for the entire period you have worn contact lenses just a few times. The amount of mechanical damage, scratches and stretching in this case will be minimal, the bacteria will be in adverse conditions. If hygienic standards are observed, the service life may be extended by one week.
If you decide to wear a two-week lens without removing, they will serve you only 6 days. With a longer period of wearing, your eyes will begin to feel uncomfortable, which is honestly recognized by all manufacturers - in such conditions, the depreciation of the lens decreases, and it may lag behind the cornea.
How to care for two-week lenses?
The main rule of care for such lenses is to place them in a special antiseptic solution and change it to fresh even in those days when you did not use lenses. Moisturizing drops will also be useful throughout the day. Preventing the drying of the lens, we not only increase the level of comfort for the eyes, but also prevent cracking of the material from which the lens is made. It is especially important to use drops if you are wearing lenses without taking them off for the night.
Which two-week lenses are better?
To date, lenses with a period of wearing 14 days are produced in almost all types:
- colored two-week lenses;
- toric lenses for correction of astigmatism ;
- optical lenses for correction of vision from +8 to -12 diopters;
- two-week lenses with a light shade, to facilitate donning and fixation on the eye.
In addition to all the advantages of lenses with a service life of 2 weeks, the product with a shade is much more convenient to use. You can see the lens well in both the container and the iris, when displaced, you can easily bring it back into place.
Of course, the most convenient and safe option of contact lenses is one-day, but the price for such products is quite high. Two-week contact lenses are a pleasant alternative. They are practically harmless to the eye, inexpensive and convenient to use. The most popular option is the Acuvue line from Johnson & Johnson .