What is corneal angulation?
Keratoconus is a progressive disease that usually occurs in adolescence or the early third decade of life, in which the cornea is thinned and its shape changes, the cornea is naturally round or spherical, but in the keratoconus The cornea is cornea-shaped and convex. This affects the refraction of light when it enters the eye and reduces visual clarity. Keratoconus (cornea) may occur in one or both eyes, but in 90% of cases Seen in both eyes.Signs and symptoms of keratoconus
Detection of keratoconus (cornea) may be difficult due to its slow progression. This condition may be associated with nearsightedness and astigmatism, and may result in blurred vision. The patient may also have nasal aura and light sensitivity. Patients usually change their version every time they visit their ophthalmologist.
Causes of keratoconus (cornea)
The cause of keratoconus (keratoconus) is unknown. The disease may be genetic because many patients are seen in a family.
Treatment for keratoconus
Soft contact lenses may be helpful in mild types of disease, but with the advancement of the disease, and the thinning and deformation of the cornea, these treatments will no longer work.
The next treatment is the use of Rigid Gas Permeable Contac Lenses. These lenses are more capable of correcting irregular astigmatism due to keratoconus (cornea).
The proper lens placement on the keratoconus cornea (keratoconus) is a delicate and time consuming task. That’s why frequent referrals for adjusting the lens and correcting the version are unavoidable. This process needs to be repeated with thinning and deformation of the cornea and the patient’s version must be reset.
If the cornea is not able to withstand the lens or the lens does not have the ability to correct the patient’s vision, the next step is corneal transplant or penetrating keratoplasty.
Currently, patients who can not tolerate severe lenses, and corneal transplantation due to their complications, are not advised to use newer methods such as inserting cornea rings like Intacs and Ferrara. A study on this method has been ongoing in recent years and the results indicate a relative improvement in patients, although it has not been shown that this method inhibits the progression of the disease.
Keratoconus (cornea) and refractive surgery
Performing any refractive error correction such as Lasik (Lasik) and Laser (PRK) in patients with keratoconus (cornea) due to the progressive progression of the cornea is not possible.