Contact lenses

Contact lenses

The contact lenses help the eyes to focus, just as the glasses, improving therefore the vision. The contact lenses can correct some problems that cannot be corrected with the glasses.

Most of that they use contact lenses do it because they do not like to take glasses. To part of that, the contact lenses do not fall, do not dim nor get wet if it rains.

The contact lenses also serve to improve the vision of people with corneas damaged due to an injury or a disease. Also they are one more a more comfortable and practical solution for which they practice sports or they make some type of task in which the glasses bother to them. With the contact lenses one better vision of the sides is perceived.

Before using it is necessary them to become a revision and to determine if their eyes could be adapted to the use of the contact lenses. Also they will recommend to him that type must use and they will again review the eyes to him after a year of to have begun to use the contact lenses.

At the beginning of using them it can be that it feels some annoyance when is placed them, which is normal. If it felt pain in the eyes it will have to go to see the oculista.

Whenever it is going to put themselves or to take off the contact lenses lávese the hands with water and soap well. If it is going to swim does not take puttings to them, since the soft contact lenses absorb the chemical agents that are in the water and if it takes permeable lenses to the gas they will leave to him the eyes. It would not have either to take them while to duer to me, this could damage the eyes to him when not receiving the cornea the sufficient amount of oxygen and also the risk of an infection runs.

The contact lenses must be placed before making up themselves and is better to use cosmetic than they are soluble to the water.

If it notices irritation, a reddening or pain in the eyes, as well as the high sensitivity to the light or the blurred vision, will have to go as rapidly as possible to the oculista.

Some people experience difficulties at the time of using the contact lenses. For example if it very has the irritated eyes due to the allergies, if it has diabetes, if it has the dry eyes or if it has a disease of the Vista that affects the surface of the eyes.

The history of the contact lenses

In 1508, Leonardo gives Vinci observed that if put the head in a crystal container with water, the vision was modified. With the passage of the investigating different years they have perfected this old theory until obtaining what nowadays we know like contact lenses.

In 1637, René Descartes had the theory that if a full water tube were applied on the eye in whose end there was a glass of the form of the cornea, there would not be refraction some to the entrance of the eye.

In 1887, the German F.A. Muller, who was a glass blower, was based on old ideas and created the first well-known contact lenses. A year later, Adolph Eugen Fick, a Swiss doctor, along with Jean Baptiste Eugene Kalt, a French optician, created contact lenses of glass that corrected defects of the vision. These lenses covered all the front with the eye and were heavy, reason why single hours could be taken to puttings.

In 1948 the first contact lenses of meth-acrylate by Kevin Tuohy made.

The first soft lenses were created by Otto Wichter to him and Dreifus in 1950.

In 1962 in Spain, Javier Chamorro Tomo and Ramon Noguera, began to make the first lenses in the Conóptica Laboratories.

In 1964, Bausch & Lomb commercialize the contact lenses of hidroxietilmetacrilato.

In 1977 in the Camera Optical in Zaragoza, Spain, they appear by the German house Wshlk, the soft contact lenses to correct the astigmatism. Bausch & Lomb begin them to commercialize in 1981.

In 1999 Ciba Vision they begin to commercialize the Day lenses & Night (Lotrafilcon-A) and Bausch & Lomb commercialize the contact lens Purevision (Balafilcon-A), that can be used day and night without clearing them to it by 30 days.

Types of Contact lenses

- Soft Contact lenses

This one type of contact lenses makes with hidrofílico plastic. This type of plastic absorbs liquids and causes that the contact lens is conserved humid so that stays soft and it is conformed more easily to the form of the cornea of the eye. This type of contact lens is the one that is more comfortable stops most of the people.

- Other soft Contact lenses, that do not absorb the water

- Semi-rigid Contact lenses, permeable to the gas

This one type of contact lenses makes with lasting and slightly flexible plastic to let pass oxygen to the cornea. The permeable contact lenses to the gas have replaced to the original type of hard lenses that made of polimetilmetacritalo, these lenses were long play and provided a good vision, the problem is that they did not allow the cornea to receive much oxygen, which could cause damages in the eye.

The care of the permeable contact lenses to the gas is easier that the one of the soft ones.

- Original hard Contact lenses

- Other rigid contact lenses

- Contact lenses Tóricas

This one type of lenses corrects the astigmatism, is associate or not to the myopia and hipermetropía.

- Progressive Contact lenses.

The progressive lenses can correct the tired Vista

- Cosmetic Contact lenses of color or