First, understand what the cornea is.
The cornea, which constitutes the pupil, is the most sensitive part of the whole body, especially the sense of touch and pain.
If the eyes are compared to a camera, the cornea is the lens of the camera, and eyelids and tears are the devices to protect the lens. When we are unconscious, our eyelids blink. Every time we blink, tears will cover the corneal surface with a thin tear film to protect the "lens".
Because the cornea is a transparent lens, there are no blood vessels on it. Therefore, the cornea gets nutrition from tears. If the nutrients contained in tears are insufficient, the cornea will become dry and the transparency will decrease.
Corneal trauma can be completely healed as long as it is handled correctly in time. The biggest concern is the occurrence of fungal infection. I want to warn you that the cornea is easily injured. First, because of its special location, it is exposed. Second, its physiological structure is special, which is divided into five layers, among which the front elastic layer can not be regenerated after injury, which affects its transparency. Because of the rich distribution of nerves, there is a great reaction after injury. What we are most afraid of is that penetrating injury, especially in the pupil area, will affect our vision to varying degrees.
So remind everyone to pay attention to protect their cornea, it is really easy to get hurt.
Netease has a column on this:/special/00181NJ/lasik.html.
It is best to go to a big hospital for examination, which cannot be ignored. The cost of examination is very low, but once it is confirmed that the cornea is broken, it must be treated immediately, so that even if the prevention and treatment effect is good, the cost will be avoided.
I hope your brother will recover soon!
Ophthalmologist
Implementation of corneal transplantation;
1. 1. The donor's eyeball should be taken out within 1- hours after death (the longest time should not exceed 12 hours), and the instruments used and the operation process should be sterile.
2. In addition to the above conditions, the donor cornea is not suitable for transplantation. Generally speaking, the number of corneal endothelial cells in a healthy cornea can be measured with special instruments before operation. Generally speaking, the number of corneal endothelial cells per cubic millimeter needs to be more than 2000.
3. For transplant recipients, if corneal lesions have no superficial vascular infiltration or only a little, the success rate of surgery can reach 90%. If there is deep vascular infiltration or glaucoma, the success rate is reduced to 60%. If corneal lesions are caused by burns or extreme vascular infiltration or complicated with severe keratitis, the success rate is only 30%.
4. Therefore, before corneal transplantation, it is necessary to carefully examine the donor's and recipient's corneas as as an estimate of the surgical results.
Corneal transplantation: surgery to remove diseased corneal tissue and replace it with a clear and normal cornea.
Indications of 1:
(1). Corneal diseases change the cornea from transparent to turbid, and from smooth to uneven. Some diseases change the curvature of cornea, which can not focus normally and affect vision.
(2) Which patients can have corneal transplantation:
Corneal leukoplakia, pannus, keratoconus, glaucoma or corneal dystrophy caused by intraocular lens surgery can be transplanted.
2 corneal transplantation source:
(1). Your own cornea-someone has a problem with the back of the eyeball, but the cornea is fine, and the other eye is just the opposite. The bad cornea and the intact cornea are paired, and you can have a pair of complete eyes by switching.
(2) Other people's corneas-infants less than six months old and elderly people over 90 years old, with poor corneal function, are not suitable for donation. Generally speaking, it is advisable to have a healthy cornea at the age of 6-60, especially for acute diseases or traumatic deaths, preferably between the ages of 25-35. If the donated cornea has undergone surgery, or suffers from glaucoma or eye tumors, it is certainly not suitable. Patients with syphilis, hepatitis, leukemia, septicemia, AIDS, systemic metastatic cancer or cachexia are not suitable for transplantation to others.
3 Where to receive corneal transplantation:
1. Ophthalmology examination in hospitals. If the doctor thinks that the condition is suitable for corneal transplantation, he will register the disease and wait for the right time to inform him.
2. Because the operation is an emergency operation, especially when the cornea is not available at present, the patient should be psychologically prepared to accept and perform the operation at any time.
How to perform corneal transplantation in 4 eyes;
1. 1. The donor's eyeball should be taken out within 1- hours after death (the longest time should not exceed 12 hours), and the instruments used and the operation process should be sterile.
2. In addition to the above conditions, the donor cornea is not suitable for transplantation. Generally speaking, the number of corneal endothelial cells in a healthy cornea can be measured with special instruments before operation. Generally speaking, the number of corneal endothelial cells per cubic millimeter needs to be more than 2000.
3. For transplant recipients, if there is no superficial vascular infiltration or only a small amount of corneal lesions, the success rate of surgery can reach 90%
%。 If there is deep vascular infiltration or glaucoma, the success rate is reduced to 60%. If corneal lesions are caused by burns or extreme vascular infiltration or complicated with severe keratitis, the success rate is only 30%.
4. Therefore, before corneal transplantation, it is necessary to carefully examine the donor's and recipient's corneas as as an estimate of the surgical results.