There are two main types of contact lenses – stiff and soft. The former are made of plastic and other materials, such as silicone. The rigid lenses retain their shape and allow a free flow of oxygen between the lenses and the cornea. These types of contact lenses may be the best option when the cornea has deep astigmatism.
On the other hand, soft contact lens types do not provide clear vision and are indicated for anyone who has allergies or tends to form protein deposits on the lenses. Soft lenses are types of contact lenses preferred by most users, because they are comfortable and have different versions, depending on their use.
Types of contact lenses depending on their periodicity
The types of contact lenses in everyday use are the simplest, since they are removed at the end of the day and discarded and replaced the next day.However, these lenses should not be used as long-term lenses.
The types of long-term contact lenses are used overnight, but have to be removed at least once a week for cleaning and disinfection. These types of contact lenses present a higher risk of corneal infection.
There are also cosmetic or decorative contact lenses
There are also cosmetic or decorative contact lenses, which have various colors and that allow to change the appearance of the eyes, also increasing the size of the iris.These lenses are medically prescribed and should only be used after an eye exam and in the presence of an optometrist .
Soft lenses allow correcting astigmatism, but not as effectively as rigid lenses.Moreover, they are usually more expensive than the others.
Bifocal or multifocal contact lenses are available in soft or rigid mode. These types of lenses allow you to correct myopia, farsightedness and astigmatism in combination with presbyopia. Cleaning and disinfection depend on the material of the various types of contact lenses.
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