Keratoconus - a disease of the eye in which the cornea becomes conical shape.Cells corneal layers are destroyed by degenerative processes, which causes a loss of its stiffness.The intraocular fluid pressure on the cornea, and it is in the form of a cone protrudes outwardly.When keratoconus complete loss of vision does not happen, but it is much worse.First symptoms usually appear to twenty years (since puberty).The causes of keratoconus has not yet been identified.
symptoms of keratoconus
The first symptoms usually appear between the ages of ten - sixteen.There is a gradual decrease in vision, first one eye and then the other.Keratoconus is often not recognized for a long time.In most cases, the initial stage of the disease is established erroneous diagnosis of myopia or myopic astigmatism.In such cases, the patient is prescribed correcting glasses, which is poorly tolerated or not effective enough.Keratoconus is diagnosed when specific complaints.The patient sees the circles around the light source
patients with keratoconus often have to go to an ophthalmologist, because the progression of the disease, visual acuity decreases rapidly and the patient in the newly selected glasses sees much worse.
During resampling points revealed that the patient to obtain the required visual acuity required a sharp increase in power and asymmetrical optical lenses, the transition from spherical to cylindrical glasses.Often there is a need to change the axis of the cylindrical glass.
Keratoconus may progress rapidly (sometimes with relapses), or to grow slowly (disease alternating with periods of stability).
Treatment of keratoconus treatment Keratoconus is both non-surgical and surgical.The method of treatment prescribed, depending on the course of the disease.By conservative methods include: correction of semi-rigid lenses and crosslinking.At the heart of the correction lens is semi-rigid mechanical indentation corneal cone with special lenses.Such lenses are soft and hard at the periphery of the center.The rigidity of the central part of the cornea, the lens provides a normal shape and softness of the rest of the non-irritating to the eyes.
crosslinking - a relatively new technique that no surgical intervention strengthens the cornea and improve its rigidity.In the process of crosslinking with the corneal surface cells are removed, and then dug riboflavin, and for thirty minutes the eye is irradiated with a UV lamp, after which it is worn the contact lens is determined that the regeneration process to protect the cornea.Such treatment is minimally invasive and safe.Held without general anesthesia in an outpatient setting.
If the stage of keratoconus gone away, or the disease is severe, then the operation is necessary because the frequent breaks of the cornea may lead to loss of the eye.Today used two types of surgery: penetrating keratoplasty or corneal transplant and implanting ICS.
IR (intrastromal corneal ring segments) are formed from a polymer thin arcs which when implanted into the cornea are located on both sides of the pupil.ICS constantly putting pressure on the cone, causing it to flatten.
Penetrating keratoplasty or corneal transplant surgery is a classic method for the treatment of keratoconus.This method is to remove the self-thinning of the cornea and the implant in its place the donor.
Penetrating keratoplasty is the most successful of all the currently available transplantation procedures.At its conduct it can be used as a local or general anesthesia.Typically, a hospital patient spends in one or two days.In the future, it is still a few days observe quiet mode.
blindfold is removed after one to two weeks after surgery.At first sight clear enough, but after a few months it will stabilize, after which you can choose contact lenses or glasses.