The deposits on contact lenses
27 Jul 2010
Periodic cleaning is an important part of the care of contact lenses, but unfortunately is not always respected. The tendency to form deposits on the lenses is the need of cleaning. Irregular cleaning accelerates the formation of deposits and leads to a number of negative consequences.
To better understand the functions cleaners must first understand the mechanism of formation of deposits. The deposits on the lenses are defined as shell, surface or matrix formation, not washed away the tear film during blinking.
Factors that influence the formation of deposits. It is important to bear in mind that many of these factors. Four of these factors are:
- Change depending on the patient;
- The material from which the lens is made ??;
- Mode of lens care.
Changes depending on the patient. These changes are significant. The form and extent of deposits in each patient is different. Some patients rarely clean the lens and yet not seeing an increase in deposits. Other enzymatic cleaner is used several times a week and forced to frequently change lenses due to the formation of deposits. In the third form gelatinous or calcium deposits within a very short time.
Deposition
Any shell, surface or matrix formation, not washed away the tear film during blinking. Differences in Education deposits may not always be attributed to patient care in their lenses, these differences can also be explained by the peculiarities of individual body chemistry of the patient. Just as some people have a tendency to form tartar or hardening of the arteries, some people have a tendency to form deposits on contact lenses.
Material for production lenses. Education deposits also depends on the material of which the lenses. Lipid deposits are usually formed on RGP and rigid lenses, while faster protein deposits form on soft lenses. Soft ion lenses with high water content absorb much more protein than non-ionic soft lenses with low water content.
Daily care
Daily care may also affect the formation of deposits. The patient is not able to regularly clean the lens gets faster growing deposits. The system thermal disinfection leads to faster formation of protein deposits on soft contact lenses.
Neighborhoods
Environmental factors, such as: air pollution and pollen can influence the type and extent of Education deposits on the lenses. Dry environment leads to the formation of lipid deposits in some patients. Additional factors include: the use of cosmetics, hand lotions and some drugs to the oral cavity.
Clinical value of deposits formed on the contact lenses. The researchers found that after six months wear soft contact lenses 50% clinical symptoms depend on the formation of deposits. Furthermore deposits on contact lenses can:
- Proteins;
- Lipids;
- Mucin;
- Inorganic materials;
- Environmental factors of life.
The deposits on contact lenses used by patients due to the action of one or more of the above factors.
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