Contact Lenses – Convenience, or The Problem? Part One

Most items have obvious drawbacks: they may be affected in the most unexpected moment, fog, rain splash, slip. Glasses impossible for skiing, diving, running fast. The presence of spots to see “the face of some people even considered” a sign of weakness. ”

To help people who want to see everything clearly, but do not want to wear glasses, small appliances hurry, which won wide popularity in the seventies of last century. The idea of using lenses to control myopia and hypermetropia are deeply rooted in the past …

Outstanding artist and inventor Leonardo da Vinci in 1508, described the devices that direct contact with the eyes will have to change their optical properties. However, neither the equipment nor the appropriate materials in the inventive Italians were not available because idea remained only an idea.

Beginning of the production of contact lenses can be called the end of 50 years of last century, when a polymer has been developed that can pass oxygen and absorb water. Ancestors of modern lenses are quite thick, which in turn leads to distortions of visual perception.

But it is a breakthrough! Items dusty house, while the happy owners wonder lenses familiar eagles surprise vigilance, along with some unusual “glass beads” look.

Now, only three known types of optical correction of vision: surgery, glasses or contacts. It is widely used all these methods, but none of them is full of another alternative, each of them has its advantages and disadvantages.

Soft and rigid gas permeable contact lenses used to correct myopia and hypermetropia and astigmatism. It is very thin and small transparent sphere-shaped cups that are placed directly on the eyeball.

The rear surface of the lens that reproduces the shape of the cornea and the front of the eye optical system corrected. This is what allows you to clearly focus images of objects on the retina rather than the exception, not unite, and without prejudice to their shape.

There are “traditional” soft contact lenses and lens “routine replacement”. “Traditional” may be used for a long time – usually several months. This type of lens needs regular care and on their surface accumulated sediments – contained in the tear film lipid and protein powder, cosmetics, micro-organisms, cigarette smoke. Planned replacement lenses must be changed 1-2 times per month or more – up to 1 day. They usually buy several pairs, and after this period, simply discarded.

When removing the lens from the eye surface (the first is advisable to remove the one that started the installation) is required each time to clean them. Pouring waste solution should be washed and dried container. Before any manipulation of small optical devices, which allow you to see the world as clearly as possible and clearly should wash their hands?

Ophthalmologists are increasingly prescribed for “routine” contact lenses because of their high security and ease of care: they do not need enzyme treatment for disinfection and cleaning is sufficient to use a special solution “all in one.”

Using the “plan” lenses greatly reduces the likelihood of allergic and infectious complications. This is explained by the fact that due to frequent replacement of these lenses does not have time to accumulate deposits harmful to eyes and say, depends on “image quality”. Imagine being forced to look at life through a stained, long unwashed window. Such a view, especially if it continues long enough, does not help improve vision.

Furthermore, due to sediment lens is uneven wetting and hydrophobic, and this in turn leads to rapid evaporation of the tear film and the feeling of “sand and dry eyes. Because if you find any, even the most basic flaw in the surface lens, it must be immediately replaced.

Select contact lenses – a very responsible profession of drama to which it is better to give up. The portability of this miniature optical devices (even the most modern and expensive) clean face. Furthermore, with the exception of optical power expressed in diopters, contact lenses have dimensions (diameter, radius of curvature). First couple must choose one ophthalmologist, based on individual patient and the amount of the cornea.

Incidentally, some patients are wrong, as an ophthalmologist with a prescription for them to wear glasses. The fact is that the diopter glass lens does not coincide with diopters of contact lenses, since those directly adjacent to the eyeball, and glasses are a certain distance from the eye.