Lens care systems

Care for lenses

Terms of care for hard and soft lenses vary considerably. There is very limited interchangeability solutions except for some cleaning systems and lubricating drops. Appeal of hard lenses usually easier in the absence of flexibility; Installation of these lenses is easier because of the small size. On the other hand, soft lenses are easier to remove. However, due to the fact that they are much more some patients (especially those who have just started wearing these lenses) are fitting soft lenses difficult.

Care of PMMA lenses

PMMA lenses require the least care of all day wear lenses. When using these lenses use solution for wetting (swelling) and cleans solution. Storage solution for swelling optional but desirable. It is also recommended to put one or two drops of the same solution before installing. After removing the lens washed two fingers in the solution clears.

Care of the lens material ZHHP

The procedure of lens care ZHHP material is similar to caring for lenses with PMMA. However, you need a storage solution for swelling so that the wettability supported lenses. The solution for swelling acts as a disinfectant storage elements, such as at night. When using lenses from PMMA material and ZHHP contain important lens clean because the dirty lenses lose their wettability. Wettability required for easy carrying and obtaining a clear visual image.

Care for soft lenses

Care for soft lenses little more complicated. Since the lenses are made up of water, they may be subject to microbial contamination. In addition, the lens surface can form deposits. So soft contact lenses should be subjected to careful clearing, and after that - thorough disinfection.

Cleaning

At the beginning of the soft contact lens was observed that on the surface film formed or sediments. These processes have led to a decrease in wearing comfort and visual acuity and abuse physiological compatibility. To resolve this problem cleaners have been developed based surfactants and enzymes.

Use is made of two types of cleaners. Cleaner based on surfactants used to remove deposits of inorganic compounds that are products of interactions with components of the tear fluid, such as lipids or calcium. Cleaner based surfactants are used every day to disinfection. Cleaning only surfactants usually enough to prevent the emergence of protein deposits. Enzymatic cleaner usually used once a week to remove any protein deposits that build up on the lenses. Cleaning before and after enzymatic treatment of lenses required.

Disinfection

Disinfection of soft contact lenses has a significant importance in the maintenance of normal vision. The disinfection is carried out at the end of each day when the lens wearing day and during extended wear lenses. Disinfection Methods divided into three main groups: thermal disinfection, chemical disinfection and hydrogen peroxide disinfection.

Thermal disinfection

In this case, carry out heating elements stored in saline. This procedure is performed at the facility where the lens kept at a temperature of about 70 ° C for 10-20 minutes. After this setting is automatically switched off and cooled lens. Chemical disinfection. Chemical or cold disinfection based on the use of bactericides imposed saline. Lenses should remain in the solution for some time (usually 4-6 hours) required for thorough disinfection. Further possible in saline flushing before installation.

Hydrogen Peroxide Disinfection

In this case, for the disinfection using well-known household disinfectant substance - hydrogen peroxide N²O. Since the lens can absorb a certain amount of hydrogen peroxide added ?? neutralization stage, preventing the ingress of hydrogen peroxide in the eye. At this stage, conducted chemical or catalytic destruction of hydrogen peroxide to form water (N²O) and oxygen (O²). This step must be performed to install lenses.

Physiological rozchynы lens

The use of saline characteristic of all care schemes soft lenses. These solutions are designed for cleaning before and after disinfection. In addition, these solutions support saturation soft lenses in the thermal water disinfection. Saline should be isotonic with respect to the tear fluid. Usually, the buffer solution was added to maintain the pH level, which provides the convenience of carrying. Saline delivered without preservatives and preservatives.

Braking fluid

For those users who contact lenses dry out, causing discomfort when wearing are the use of lubricating fluids. Persons who use extended wear contact lenses should apply one or two drops of the lens before sleep and after sleep that will provide satisfactory operation lenses.