To win on points of
Glasses wearing gives the mass of an inconvenience. Nevertheless with the advent of contact lenses they did not consign to the past. And people with sight shortcomings can not always find a definite answer to a question that it is better - points or lenses.
Complexity of the choice between points and contact lenses is explained by one very simple reason: everyone wants to see well and at the same time to look good in the opinion of people around.
Points - the simplest, available and safe method of correction of sight. That this way was also effective, to points it is impossible to belong as to goods haberdashery. Buying glasses, many assume that the most important - to pick up a suitable frame especially as they can be bought from market peddlers, in transitions of the subway, in booths.
“My buyers first of all pay attention to appearance of a frame, and then are already interested in dioptries“, - one of peddlers in transition of Arbatskaya metro station shared with the correspondent of SP the impressions. However, the fact of selection and purchase of points in transition horrifies ophthalmologists.
“The person who bought glasses at illiterate hardheads will get used to the wrong optics where dioptries and intercenter distance are not observed or lenses are made of low-quality material, - the ophthalmologist Larisa Yampolskaya warns. - At the same time the organism turns on mechanisms of compensation of optical distortion, and as a result of people will receive overfatigue of eyes, a headache and the progressing deterioration in sight“.can Choose by
lenses wearing spectacles not only on dioptries, but also on material of which they are made. Plastic lenses, unlike glass, much stronger and, most likely, will not break if points incidentally fall. Lenses from plastic at identical dioptries, thickness and easier glass therefore they are convenient when loss of sight is rather big. “Imagine what weight there will be glasses wearing spectacles if the person has a sight, for example, minus seven, - without their rim it is simple not to insert into a graceful frame“, - Elena, the consultant of Optika salon says.
However, also shortcomings are: plastic demands very accurate address. It is impossible to put on a firm surface such points lenses down as plastic can be scratched.
For the same truly to pick up color of an optical element wearing spectacles, it is necessary to consider reaction of eyes to bright light.“ If the person notices that at a sunny weather to eyes it is uncomfortable, then we recommend to insert tinted windows or the photochrome which is usually called by `chameleon`“, - Elena says.the Right choice of a frame, however, is not less important
. He does not suffer vanity, to understand as far as you conveniently wearing spectacles need time. A nasal emphasis should not hurt a nose bridge (in qualitative frames they soft and mobile), and earhooks - to press on whisky.
it is also Very important to pay attention to material of which the frame is made.“ From low-quality plastic or metal there can be a so-called contact allergy. Substances which can possess toxic action are a part of plastic. There is still “a nickel allergy“, similar to that that arises from a watch and lightnings on clothes. Displays of such allergy - reddish rashes“, - the dermatologist Alexander Vasilyev explains.
“The good frame has to not only to look effectively on a face, but also to provide the correct provision of lenses before eyes: so that the average line of light apertures passed approximately through the centers of pupils or is slightly lower, and the back surface of lenses was in twelve millimeters from cornea top“, - available language the ophthalmologist Larisa Yampolskaya states.
At all the advantages points can give to the owner the mass of an inconvenience: are constantly soiled, mist over, slip and fall, prevent to play sports and any other vigorous physical activity. And the first that occurs to the person to whom bothered to drag points, - to pass to contact lenses.
Before purchase of lenses should address the ophthalmologist: he has to perform inspection to exclude diseases at which use of contact lenses is excluded.
K to them inflammatory diseases of eyes (keratita, sklerita, uveita, blefarita and conjunctivitis) belong at which the mechanical influence of lenses and a lack of oxygen caused by their carrying can aggravate a course of disease. Lenses are contraindicated at impassability of plaintive ways and an inflammation of a plaintive bag. They are not appointed to people with good-quality educations which mechanically obstruct the traffic of lenses.the doctor will determine by
as a result of diagnostics force of lenses in dioptries and the radius of curvature of a cornea that the lens automatically settled down in the middle of a cornea and was not displaced aside.
lenses before points have that advantage that the picture, visible through them, is closer to that that is perceived by absolutely healthy person as an eye and a lens represent uniform optical system. The glass of points located on some removal from a crystalline lens cannot give such naturalness by definition.
Opponents of contact lenses claim that the first seven minutes of carrying the lens gives cornea hypostasis, interrupts contact of an eye with the atmosphere, breaks food of an eye a tear, complicates a conclusion of slags.“ In that case it is possible to use firm lenses. The newest modifications of firm lenses are capable to make gas exchange, and an eye in them easily breathes“, - the doctor Larisa Yampolskaya says. Firm lenses in comparison with soft correct visual impairments better, but it is more difficult to get used to them.However and modern soft lenses are very elastic
, they may contain up to 70% of liquid, and though they densely sit on a cornea surface, its food thanks to such high content of liquid is not broken. However, soft lenses are less durable, demand the gentle address and careful leaving.
In lenses, are said by their supporters, it is safer to ride a bicycle and the car, to climb up the mountain and to rush from it on skis, to raft on the river on a kayak and in general to lead a mobile, sports life. But at the same time to be careful, for example, when swimming.“ To the patients I recommend to swim only wearing spectacles for swimming, otherwise water can wash away easily lenses from eyes. Besides, in open reservoirs the mass of microbes, in the pool are a lot of chlorine, and soft lenses have the high absorbing ability“, - Larisa Yampolskaya says.
of the Lens cannot be broken as points, you will not forget them on a visit or at work. But in lenses it is not recommended to fly on the plane. Low humidity in inside of the plane can result in dryness of an eye that causes discomfort. That to get rid of it, it is necessary to use the special moistening drops or at all to remove lenses during flight. The cornea breathes atmospheric air. When between a cornea and the atmosphere there is a barrier in the form of a lens, breath is complicated.by
A from dry air breaks a protective barrier from tears which transport nutrients to a cornea and delete products of its activity. The negative effect of pressure differences when flying a lens is not strengthened: weak vessels of an eye can burst, but it has no relation to contact correction.Carrying lenses creates
and still which - what inconveniences.“ Some patients cannot just get used to foreign object in an eye, - Larisa Yampolskaya explains. - Sometimes complication of contact correction are allergic reactions. It is easy to recognize such allergic persons by constantly red eyes“. But even those whose eyes quietly react to contact lenses, are not insured from the infectious diseases threatening with heavy complications including total loss of sight. Not to bring some infection in an eye, it is necessary to follow recommendations of the ophthalmologist about care of lenses, hygiene and the mode of carrying. It is necessary to remember what term of replacement at your lenses, and to work according to (lenses happen the one-day, week, two-week, monthly and annual term of carrying). Lenses can cause troubles if to carry them in dusty and gas-polluted rooms where they with ease absorb harmful substances. Therefore it is contraindicated to people whose work is connected with chemical production, or, for example, builders to carry lenses.
With the right of carrying
meanwhile “such cases when not to do without contact lenses are. Eyes wearing spectacles, written out to the people suffering from an anizometropiya (a disease at which eyes are seen with a big difference), can look asymmetrically - one more than another. And the lens can be inserted into one eye, and it will not be noticeable“, - the doctor Yampolskaya says.can choose by
Today lenses which perfectly cope not only with such widespread illnesses as short-sightedness and an astigmatism.by
“To help the people suffering from a presbiopiya when an eye cannot be focused on the objects located close thought up bifocal contact lenses which have two parameters of optical power for each eye. One for watching afar and one for a short distance, for example for reading“, - Larisa Yampolskaya says.
“In dispute that it is better - points or lenses I think, four-eyes win today, - Elena, the consultant of Optika salon says. - Women, as always, watch novelties more and try to be in the fashion - therefore they, as a rule, in an arsenal have both points, and lenses. Men in this plan are more conservative and, as a rule, use points, trying not to take themselves for a ride. Points - the plot also went, and with lenses there is a lot of trouble. They, unlike points, need to be learned and put on and to carry.
Imagine a situation when between a lens and an eye dust got. The lens should be removed and rinsed solution. Means, drops to eyes, solution and the container for lenses always have to be near at hand. And if besides hands are dirty?“
Those who carry lenses have to observe strictly sequence of a morning toilet - at first to use aerosols, and then to put on the lenses (sprayed by aerosols of substance settle on lenses and damage them). Therefore the people not confident in the pedantry and accuracy refuse continuous carrying lenses, preferring or not to use in general them, or to resort to them from time to time.Points of the late Middle Ages Historians still cannot unambiguously tell
who and when invented points. The need for means of correction of sight was so big that in the second half of the 13th CENTURY points were made at the same time in several regions of Europe. Originals of early points did not reach up to now, however from the second half of the 13th century points began to appear on faces of characters of frescos and miniatures. In San Nicolo`s church in Trevizo (Italy) there are two curious frescos. The N and is represented by one of them executed in 1352 the cardinal Ugo di Provence with points on a nose. The second is written for 20 years earlier - on it the cardinal Nikola de Rowan reads the book through a monocle.
Earhooks at points appeared only in the first half of the 18th century. The name of the inventor of earhooks also is definitely not known. Contact lenses thought up more than hundred years ago. In 1914 the German firm KARL ZEISS organized their line production. Then lenses represented fragments of glass which were inconvenient to be carried in view of their weight (though persons interested nevertheless were). And in 1936 the ophthalmologist Otto Fikhterle thought up soft lenses.