Cornea

Cornea
The cornea is a clear tissue that resembles a clock face and is located in the anterior part of the eyeball. The absence of blood vessels in this tissue is the reason for its transparency. The cornea is convex and very sensitive.
The cornea is nourished not by blood but by air due to the lack of blood vessels. That is, the cornea receives the oxygen it needs directly from the surrounding air.
Due to its convex shape, the cornea provides maximum ocular strength, and the greatest refraction of light rays occurs in this part.
What is corneal transplant surgery?
Corneal transplant is a delicate operation performed on the eye. Corneal transplantation is performed when it is not possible to correct the patient’s vision due to the deformation of the cornea. During surgery, the patient’s cornea is removed and replaced with a transplanted cornea, and several sutures are inserted depending on the type of corneal transplant to strengthen the transplanted cornea and prevent it from moving.
Who needs a corneal transplant?
Most cases of corneal transplantation are related to those who have keratoconus. Also, following a severe corneal ulcer, loss of shape and condition of the cornea due to various causes of corneal damage and scarring on the cornea so that the cornea loses its transparency, a corneal transplant should be performed for the patient. If the previous corneal transplant is cloudy in someone who has already had the operation, the person will have to have corneal transplant surgery again.How is the cornea prepared for transplantation?
All corneas used for transplantation are made from the corpse. These corneas are separated from the corpse in less than 12 hours after death and kept in a suitable environment.
In cases where the cause of death of the deceased is not known, his cornea can not be used for transplantation. Before removing the cornea, a culture is taken from the eye area to check for any infections. Also, the blood of the corpse is checked for the absence of diseases such as AIDS and hepatitis.
What is pre- and post-surgery care?
The patient is admitted to the ward on the morning of the operation. It is necessary for the patient not to eat anything the night before the operation and to fast on the morning of the operation.
Necessary procedures are performed in the ward and the patient is prepared for surgery.
After surgery, usually 2-3 hours after the patient enters the ward, the patient should not drink even water because of the effect of anesthetics, vomiting is more likely, and if the patient vomits, the stitches are pressed.
The patient is usually admitted to the ward overnight and discharged from the hospital in the morning after surgery.
Dear patient, observe the following points after surgery. For better results:
1- Do not sleep on your stomach after surgery.
Avoid lifting heavy objects.
3- Do not bend from the waist down.
4- Protect your head and face from any blows or strong shaking.
5- Do not roll your eyes.
6- Be sure to wash your hands before using eye medications.
See your doctor right away if you have decreased vision, pain, redness, eyes, severe runny nose and eyelid swelling.
DESEK, DALK:
In these two types of transplants, there is no restriction of movement and prevention of lifting heavy objects, but the rest of the care points must be observed.
The ultimate goal of this medical center is to provide the best service to all dear patients.
So help us in this serious matter with your constructive suggestions and criticisms.
Your health is our wish!

Dr. Mir Hosseini Hospital
corneal transplantation
Producer: Yalda Parsi
Azam Ghaedi (Education Supervisor)
Confirmer: Dr. Moallem (Surgeon and Ophthalmologist)
Source: ???? the eye
Date of preparation: Autumn 91
Review: Fall 97