It's hard enough to explain what is astigmatism.The disease is one of the most common reasons why reduced vision.Often the disease is combined with myopia or hyperopia.
Translated from the Latin word "astigmatism" refers to the absence (focal) point.There is this eye disease due to the irregular shape of the cornea, sometimes - the lens.The patient sees any image distortion - one line may be clear, and the other - washed.To imagine how it is, just look at yourself in the oval teaspoon.
This distorted image is formed and astigmatism in the eye retina.Experts divide the disease in the corneal and lenticular.Corneal greater effect on vision, as it has a greater refractive power.To find out the amount of disease in diopters, it is necessary to calculate the difference in the breaking of the strongest and weakest meridians.The direction of the axis of astigmatism meridians characterizes what is expressed in degrees.
possible degree of astigmatism
There are three degrees of eye astigmatism, dedicated spe
- weak degree (3 D);
- moderate (3-6 D); highly
- (above 6 D).
Types astigmatism eye
Depending on the nature of the disease is divided into congenital and acquired.Congenital astigmatism up to 0,5 D can be found in most children.This type of disease is not completely able to affect visual acuity, as well as its development of binocular.It happens that the figure exceeds 1 D at diagnosis astigmatism in children - treatment in this case is often carried out by means of spectacle correction, as the vision of the child is considerably lowered.The appearance of the acquired type of the disease is due to rough scar changes on the cornea as a result of injury, various injuries and surgeries on the eyes.When the diagnosis of the symptoms of astigmatism proyavlyayutsyav as reduced vision, headaches, fatigue under load on the eyes and brow pain in the facial area.
main methods of correction of eye disorders are glasses, contact lenses, laser surgery and keratoplasty.Points in this disease is the most common method of correcting astigmatism in the diagnosis - treatment by this method is especially indicated in children.With special cylindrical lens astigmatism correction occurs.It allows you to fix the optical eye system deficiencies by strengthening or weakening of the optical power in a certain meridian.Cylindrical lenses can be a "plus" and "minus".
Contact lenses for astigmatism more convenient substitute points are considered contact lenses - are now used soft toric lenses.Toric lens surface or data created on the front or on the rear surface of the article.Lens having a toric front surface, and can correct the corneal lenticular up to 4,5 D, are the same as have toric back surface corneal astigmatism correcting up to 6,0 D. lenses individually are selected only after careful patient diagnosis.It is worth noting that glasses and contact lenses can correct vision only - cure the disease can only be surgery.
The most effective treatment is laser vision correction.Correction occurs as a result of changing the shape of the cornea.During correction using laser attached to it the desired spherical shape, and the parameters may be different for each patient.After this procedure, the patient has good vision again.Laser correction is often used to treat astigmatism.With this procedure it is possible to eliminate the disease to ± 3,0 D. The correction is performed on an outpatient basis and takes no more than 15 minutes - the laser is valid for only 30-40 seconds.The patient does not feel pain because of local anesthesia drip.Indications for laser correction are determined individually based on a complete diagnosis, as well as taking into account the age, general condition of the patient and the professional activity.The procedure is available to persons aged 18 to 45 years, but the decision is made by a doctor, so this framework is not strictly limited.Do not use this method in the treatment of astigmatism during pregnancy and lactation.
Keratoplasty is a surgery that aims to restore the form and function of the eye cornea, as well as the elimination of congenital and acquired defects and deformations.This method is used only when the correction is not possible using other methods.The operation to replace the donor cornea or a synthetic graft.The operation is performed under local anesthesia.