Limbal Stem Cell Implantation

Limbal stem cell transplantation is a treatment method in which the limbal stem cells needed for the cornea, the outermost layer of the eye, to renew itself and keep its transparency are transplanted. Limbal stem cells are the stem cells in the region called the limbus, which lies at the front of the eye around the cornea. These cells are critically important for the cornea to stay healthy and renew itself.

Limbal stem cell deficiency arises when these cells are damaged or depleted and the cornea can no longer renew itself. This condition can lead to serious vision loss and permanent damage to the corneal surface. Limbal stem cell transplantation is performed to repair this damage and restore the health of the cornea.

What Is Limbal Stem Cell Deficiency?

Limbal stem cell deficiency is a serious eye disease in which the cornea's ability to repair itself is impaired. When the stem cells in the limbus region are damaged, the cornea cannot renew itself and the transparent layer of the cornea gradually deteriorates. This condition leads to problems such as permanent cloudiness, scarring, inflammation and vision loss in the eye.

The main causes of limbal stem cell deficiency are as follows. Chemical burns: contact of the eye with chemical substances such as acids or bases can damage the stem cells in the limbus region. Severe eye injuries: trauma or injuries can lead to the loss of limbal stem cells. Long-term infections: recurring or long-lasting infections in the eye can damage the limbus region and lead to stem cell loss. Excessive contact lens use: long-term and incorrect use of contact lenses can cause damage to the corneal surface and limbal stem cell deficiency. Congenital diseases: some genetic diseases can cause congenital limbal stem cell deficiency.

How Is Limbal Stem Cell Transplantation Performed?

Limbal stem cell transplantation is a surgical procedure that involves transplanting new, healthy limbal stem cells in cases where the stem cells in the patient's limbal region are damaged. The transplant can be performed using limbal stem cells taken from the patient's own eye (autologous transplant) or from a donor (allogeneic transplant).

Stages of the Surgery

Assessment and preparation: before the transplant, the degree of limbal stem cell deficiency in the patient's eye is assessed. If limbal stem cells can be taken from the patient's healthy eye, an autologous transplant is preferred. If both eyes are damaged, it may be necessary to take limbal stem cells from a donor.

Preparation of the donor stem cells: in an autologous transplant the cells are taken from the patient's healthy eye, and in an allogeneic transplant from a suitable donor. These cells are taken as a small tissue sample and prepared to be placed in the limbal region on the cornea.

Limbal stem cell transplantation: after cleaning the damaged cells in the limbus region, the surgeon carefully places the healthy stem cells taken from the donor into the limbal region of the eye. The transplanted cells contribute to the eye's natural healing process and help the corneal surface renew itself.

Protection and dressing: after the transplant is completed, the eye is carefully closed and a protective bandage is applied. During the recovery process it is important to protect the eye from external factors.

Types of Limbal Stem Cell Transplantation

Autologous transplant: in this method, limbal stem cells are taken from the patient's healthy eye and transplanted into the damaged eye. This type of transplant is safer immunologically, because the body does not perceive these cells as foreign.

Allogeneic transplant: in this method, limbal stem cells are taken from a genetically compatible donor. If the patient has limbal stem cell deficiency in both eyes, this method is preferred. However, immunosuppressive medications may be used to prevent immune rejection.

Recovery After Limbal Stem Cell Transplantation

The recovery process after limbal stem cell transplantation can take time. Depending on the patient's condition and the extent of the surgery, healing can take from a few weeks to a few months. During recovery it is very important for the patient to attend regular doctor check-ups and to use the prescribed medications carefully.

In the first days there may be mild discomfort, stinging, burning and watering in the eye during the first few days; these symptoms decrease throughout the recovery process. Vision may be blurry at first, but as the new limbal cells help the cornea heal, vision improves over time.

Eye drops and medications: eye drops are used after surgery to prevent infection and reduce inflammation. Steroid drops are also used to help prevent the body from rejecting the transplanted cells. If an allogeneic transplant was performed, immunosuppressive medications may be prescribed to prevent the patient's body from rejecting the donor cells.

Follow-up: regular eye check-ups are carried out after surgery. The doctor closely monitors the healing of the eye and adjusts the medication treatment if necessary.

Benefits of Limbal Stem Cell Transplantation

Enables corneal renewal: limbal stem cells allow the cornea to renew itself in a healthy way again and help heal the damage on the eye surface. Improves vision quality: as the corneal surface becomes transparent again, the patient's vision quality improves significantly. Treats serious corneal damage: limbal stem cell transplantation offers an effective solution for patients with advanced corneal damage.

Risks of Limbal Stem Cell Transplantation

As with every surgical procedure, limbal stem cell transplantation also carries some risks. Risk of infection: there is a risk of infection developing in the eye after surgery, but the antibiotics recommended by the doctor reduce this risk. Immune rejection: in an allogeneic transplant there is a risk that the body will reject the donor cells; immunosuppressive medications are used to reduce this risk. Impaired vision: vision may not improve immediately after surgery, and in rare cases there may be a deterioration in vision.

Do Not Delay Treatment

Limbal stem cell deficiency can cause permanent vision loss when left untreated. If you are experiencing constant cloudiness, scarring or inflammation in the eye, early diagnosis and treatment is the most effective way to protect your vision. Do not neglect to consult an eye doctor for detailed information about limbal stem cell transplantation and to evaluate your treatment options.

This page is for general information and does not replace a personal examination. The right approach is decided together after an eye examination.