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Lenses can be classified into short-term replacement lenses, disposable lenses, and continuous-wear lenses, depending on the cycle of use. Short-term replacement lenses can be 3 months, 6 months or 12 months. 12 months is a reasonable time, but it's a good idea to change the lens frequently before the lens starts to cause problems.
The most frequently used lens is a disposable lens. Disposable lenses also come in one month, two weeks, one week, and daily wear lenses. Among them, the most preferred lens is the daily wearing lens. The daily wear lens is a lens that should not be used twice a day and does not need to be managed separately, and shows a great preference for convenience because a new lens is worn every day. In addition, no deposits can accumulate, so you can wear the lens every day with a clear view. However, even if clinically problematic, there is a disadvantage in that the new lens can be overlooked and beyond.
A continuous wearing lens refers to a lens worn continuously for a certain period of time without removing the lens. Although it has the advantage of convenience, it is not currently used well because it is too dry and corneal edema occurs.
Lens wore for 6-8 months through care. It is usually called a "bottle lens" in an optician because it comes in a glass bottle. Among the soft lenses, it is one of the highest grades and the cheapest price. Just as long as you spend more management should be more thorough. Management law follows the above.
The lens discards after wearing for only a short time. It is often referred to as a "pack lens" in an optician because many plastic boxes are packed in cartons. There are usually three wearing periods: one day, two weeks, and one month, and three, seven, and three-month lenses are rare. This paragraph describes only the first three types.
Famous brands of Pac-Lens include Bausch & Lomb, Acuvue, Alcon, and Coopervision. Of course, there are many other places to look for, such as menicon, ok vision, stray light, and interlojo. Recently, almost all brands are focusing on silicone hydrogel lenses, since silicone is basically a material that does not mix well with water, which can reduce tear consumption slightly.
Daily Disposable Contact Lenses
Throw away after wearing a day, literally disposable lenses. It is the pack lens most commonly known and spread in Korea under the name of the one-day lens.
As it is a disposable one, there is no care. However, don't forget to wash your hands as mentioned above, and never reuse lenses that you have already worn on your own account. The recommended wearing period for one-day lenses is less than 6 hours per day, which is shorter than normal soft lenses, and less than 2 to 3 times a week.
The one-day lens is characterized by high moisture content and softness, so the initial fit is very good, but it absorbs a lot of tears and causes capillary phenomenon, causing evaporation and causing dry eye. The most common phenomenon found in one-day lenses is the thin film. Instead of being comfortable to wear and care, eye health is not as good as other lenses.
It is also a lens that has an infamous record of 'wearing eye disease incidence number 1' among all contact lens products. This is a surprising result, which seems to be flawless in hygiene because it is easy to forget to wash your hands and handle the lens because of its simplicity.
2-Weekly Contact Lenses
The lens throws away after wearing about 14 days. Although it falls under the category of daily wear lenses, it's a little closer to disposable lenses.
Recently, due to the explosive increase in the specific gravity of the wear lens for one month, there is a lot of feeling, but there is still an enthusiast layer. In the two-year range, Accuve was the most common, and as it stopped producing advanced products that were lesser lenses, there were almost no products in the category of inexpensive (non-silicon hydrogel) two-week wear lenses. Of course, it is much cheaper than one day if you calculate the price compared to wearing. Interlojo and stray light are still inexpensive.
2 Wearing lenses should be worn within 8 hours per day, and every other day as regular soft lenses. If you wear every other day, wear time is extended by about 7 days.
The management method is the same as that of the daily wear lens, but since it is a short term lens, it is not a big problem to manage it with only the multipurpose liquid.
Monthly Contact Lenses
The lens throws away after wearing for approximately 30 days. From here, it is almost a daily wear lens. In recent years, the type and location of the pack lens have been rising significantly.
In fact, it is inevitable that this will be the best alternative to offset the problems caused by poor management of long-term wear bottle lenses, severe eye damage and expensive price of one-day lenses. Of course, if you take good care of the long-term wear lens quality will be better, but apart from good care, psychological problems are also appealing to people who reject long-term wear lenses.
Another reason for the increase in the position of the one-month wear lens and another reason that the silicone hydrogel lens is the main focus is that the one-month period is the most stable period to apply the silicone hydrogel material. The silicone hydrogel material has a high oxygen permeability, but it is very easy to combine with fat. If the silicone hydrogel material is used as a long-term wear lens, the price goes up, but the life is shortened. In the case of a one-month wear lens, it is the best option because it is a short period of time that does not cause problems with fat bonding.
The wearing cycle of the one-month wear lens is worn within 8 hours per day, and every other day, same as general soft lenses. If worn every other day, the wear period is extended by about 15 days. The management method is the same as that of the daily wear lens. It can only be managed with a multi-purpose solution, but there is no difference in terms of deadline, and the loss of wearing and eye