What is keratectomy?
keratectomy is a surgery that includes partial or complete corneal removal. When the corneal tissue is performed, corneal tissue is carried out or damaged, the corneal removal is usually performed by an outpatient base. Several applications are associated with corneal removal, from corneal transplantation to vision correction. As with any medical procedure, there are risks associated with keratectomy and should be discussed with an ophthalmologist before the operation.
Corneal transplantation is the most common use of corneal removal. During the transplantation process, part of the corneal tissue is cut with laser and is replaced by a donor part. Depending on the severity of the corneal status, partial or complete transplantation can be performed. Corneal transplantation is used to improve vision, relieve pain and improve the appearance of the cornea. The risks associated with transplantation include corneal rejection, corneal infection and swelling.
Initially, the corneal excision was done by hand nobun. Astigmatic keratectomy (AK) was among the first successful keratectomy and is still being done to this day. During the AK, two cuts along the marked areas are carried out to change and repair its shape. Although astigmatism is alleviated, AK has been associated with an increased risk of infection, light sensitivity and glare. Modern approaches to corneal removal are used for more than just correction of astigmatism.
In the mid -1990s, a new generation of keratectomy was introduced, which was carried out with a laser. Laser assisted in situ keratomileusis, or lasik, combined the use of an oscillating blade and a precise laser for the corneal tissue. During the lassy, a corneal valve is formed, through which a small part of the cornea is removed and laser -tissue lasering is used to transform R. The corneal boy recovers alone without the help of stitches. The risks associated with the lasic include infection, wrinkles of the valve and ecstasy of the cornera sheep or bulging cornea.
Corporate rebuilding is another procedure associated with many keratectomy functions. Although it can be performed in non -surgical capacity, the corneal transformation plays a key role in the successful application of photorefractional keratectomy (PRK). Using an ultraviolet laser, a board is carried out to reduce the patient's dependence on glasses or contact lenses.
In order to correct myopia, the ultraviolet laser removes the tissue from the center of the cornea to make the corneal surface more even. In the case of foresight, the opposite occurs that the cornea is formed by removing the corneal tissue from the outer edges of the cornea. Astigmatisms are repaired by transforming the cornea into a more round shape. PrK complications include corneal turbidity, Strrolonged time of healing and infection.
PRK is often combined with the treatment of corneal therapy known as phototherapeutic keratectomy (PTK), which is used to treat the surface scars of the cornea and disease. During the PTK, the fifths are removedA more corneal layer to form a more even corneal surface. The common conditions associated with PTK treatment include corneal dystrophy, where the vision is disrupted due to corneal turbidity; Opacity or loss of corneal transparency; and scarring. The side effects associated with PTK include visual effects such as light and glare sensitivity, which usually decrease with time.