Today, the use of contact lenses is a popular method of vision correction , which is worthy of competition with the use of glasses. Lenses are classified according to some characteristics, including the time of their planned replacement (the mode of wearing): one-day, two-week, monthly, half-yearly, etc. As for the lenses with which service life it is desirable to give preference, a lot of disputes are under way, lenses have their admirers. Let's try to figure out which of the two common types of lenses is better - one-day or monthly.
What distinguishes one-day lenses from menstrual periods?
Lenses of monthly wearing are soft contact lenses of reusable use with a service life of 30 days. After this period of time, the lenses require replacement with new ones. As a rule, such eye aids are worn in the morning, and before going to bed, they are removed by placing them in a container with a special storage solution. Also there are lenses of prolonged wearing, which can be worn without interruption for the night. But it is worth considering that not all lenses and not all patients can be worn continuously for a month - in some cases it is recommended to take a break for one night after six days or another term.
They are made of materials that provide a smooth surface, sufficient level of moisture, oxygen exchange, and also prevent the rapid contamination of lenses with protein deposits. Therefore, lenses with a monthly service reserve are comfortable, comfortable for the eyes and do not require deep enzymatic cleaning. Monthly contact lenses are a popular economical option for those with vision problems who use them constantly, daily.
One-day lenses require replacement every 24 hours. They are sold in large packages of 30-90 pieces and are made of several other materials that do not differ in durability. At the same time, such devices perfectly cope with their functions. Unlike monthly, one-day lenses are more flexible, soft and thin. In addition, they are characterized by a high degree of oxygen permeability, which makes it possible to use them even in the most sensitive eyes. Other distinctive advantages of lenses with a one-day period of use are:
- Sterility - when using such lenses you put on a new, absolutely sterile pair every day, so the risk of infectious complications for the eyes is significantly reduced;
- No need for special care - one-day lenses are thrown out after their service life and do not require the use of special cleaners, disinfectants, storage solutions, which simplifies their use;
- Eliminating the forced use of damaged lenses - not always lens defects that can occur even after several days of wearing, can be obvious, so sometimes patients use damaged devices,
capable of imperceptibly injuring the cornea, and when wearing one-day lenses this is excluded.
Of course, all these advantages are reflected in the cost of one-day wearing lenses. But still it is not much higher than the price of a monthly lens, given that the latter require the purchase of additional care products.
Can I sleep in one-day lenses?
Many experts agree that it is desirable to remove lenses at night, even one-day ones. Otherwise in the morning you can get not only such uncomfortable sensations as dryness or glueing of the eyes, blurred vision, but also conjunctivitis and other diseases.