Corneal imaging and density measurement
Corneal imaging and density measurements
The cornea is the primary axis of the eye, as it is the transparent part at the front of the eye, and is responsible for 70% of the vision process, through which lights and images pass. Any damage to it threatens to impair vision or even blindness.
Recently, there has been a tremendous shift in the methods of diagnosing and photographing the cornea, as there are numerous techniques and devices that can probe the depths of the eye, and achieve full checks that pave the way for successful surgeries in the cornea.
Corneal imaging opens the door for doctors to make an accurate diagnosis, and to make pre- & post-operative comparisons, which include vision correction operations, as well as partial or total corneal transplants.
The role of the corneal imaging device is not limited to corneal diseases, as it has gone beyond them to help doctors in early detection, and to diagnose other diseases that may affect the eye.
In this article, an explanation of some techniques of cornea imaging and measuring the thickness of the cornea, which are of great importance to those involved in surgeries in that sensitive location, which does not allow any error ratio, because the error in it may drag the patient into the problem of blindness for the rest of his life, as we dealt with at the end of the article Some eye diseases, which may require surgical intervention.
What do you know about corneal imaging devices?
Corneal imaging is a necessary procedure before undergoing corneal surgeries, such as keratoconus surgery, or LASIK eye correction procedures. Corneal imaging methods differ by the different corneal imaging device, and the thickness of the cornea must be measured because the thickness of the cornea is greater or less than Natural thickness is explained by the presence of a disease that affected the cornea. When photographing the cornea of the eye and showing its thinning, it will take a conical shape, which is known as keratoconus disease.
When Corneal imaging with a CSO Sirius device, which is equipped with a Pentacam camera or a five-way camera, the device takes twenty-five images of the eye, differing in that they are internal and external. The CSO Sirius corneal imager analyzes the cornea and lens of the eye completely; thus the examiner makes sure that the health of the eye as it should, It also determines the most appropriate operations to be performed by the patient. This device can detect early - by corneal imaging - the injury of the eye with keratoconus and can monitor to what extent it has developed.
The importance of CSO Sirius and Pentacam:
This device is the latest science in this framework, and it is a device that combines corneal imaging between the two most accurate methods in the world. The rest of the devices that are used to Corneal imaging use only one way, and this makes the examination using this device is the most accurate at all.
It is used in the diagnosis of all cases of keratoconus, and those diseases that are similar to it.
Provides accurate information about corneal thickness.
Provides very accurate information about any corneal imbalance that is not visible to the naked eye.
It compares very precisely between previous and new examinations and adds a lot of information, which may not have existed before.
When planting lenses and growing their rings and designing hard lenses, this device is used.
The device examines glaucoma by Corneal imaging and accurately calculating the internal pressure of the eye.
In many eye operations, surgeons need to measure the depth of the anterior cabinet.
This device can provide an angle of the eye and the degree of wide-angle to 360 degrees.
When Corneal imaging cross-section image, it provides an accurate image, suitable for determining the depth of damage to the surface of the cornea, which facilitates its laser removal.
Corneal imaging using a corneal elasticity tester:
This device enables physicians to determine the extent of flexibility and rigidity of the cornea. Through it, they can know the appropriateness of the cornea for any eye-correcting operations, as it is essential for patients suffering from high-pressure eye disease, and it measures the extent of the response of the cornea to high eye pressure medications.
Corneal imaging device (terrain):
Among the devices of the cornea imaging, there is an accurate device that diagnoses the terrain of the cornea, this device works with a system of Placido Disk, creates (a topographic map of the eye). The doctor immediately knows the eyes that suffer from defects in vision, and this also includes the following diseases: tilt and conical corneal and astigmatism and even the deviation from the center.
This device is the most suitable device for Corneal imaging and preparing it for the process of correcting vision in Lasik. The most important benefit that the patient acquires from Corneal imaging (terrain) is the ability of this device to know the cases, in which the surface of the cornea is uneven, and these cases that cannot be detected the path of traditional corneal tests.
To accurately correct vision in LASIK operations, this device is used with other methods to corneal imaging and to know the amount removed from the corneal tissue to better correct and accurate vision.
It is also used to discover and monitor those other diseases that the eye suffers from, and whose detection accurately represents an essential first stage of treatment, and the map provided by the Corneal imaging device (terrain) is useful in assessing some diseases, including:
Distortions of the cornea.
Abrasions on the cornea.
Some diseases of the cornea.
Astigmatism resulting from corneal transplantation.
Astigmatism resulting from the known cataract surgery.
How to perform corneal eye imaging:
The patient sits in front of the device in a chair.
The patient places his head on the chin brace.
The device scans the cornea of the eye and then takes pictures of it.
The device sends the images to a unique program on the computer.
The program analyzes the photos taken by the device and maps them accurately.
What appears in the image of the eye after filming the cornea?
Detailed information about the cornea, and maps were drawn for it.
Other information about the thickness of the thinnest point in the cornea of the patient's eye.
Information about the presence of places and elevated islands on the posterior and anterior corneal surface.
The strength of each point scanned by the device while Corneal imaging.
Important information about the development of keratoconus disease.
Eye placement before entering into LASIK eye corrections.
Confoscan cornea imaging:
This technique is used to corneal imaging of the eye, as part of the medical examinations that precede surgeries. It is used as a rapid diagnosis of keratoconus or (keratoconus) disease. Through this technique, doctors can ensure the integrity of the inner layer of the cornea of the eye, or what is known as (the endothelium), and is also used before some surgeries to identify the depth of the surface layer that is removed from the cornea. This technique is also used to verify the integrity of the outer layer of the cornea of the eye.
Slit Lamp Photo:
This device is used to corneal imaging, often to examine the diseases that the cornea is rarely affected. These pictures and shots are examined carefully by the doctor later.
Ultrasound corneal thickness measurement:
It has become known that measuring the thickness of the cornea is necessary for those who perform LASIK surgeries for treating visual defects (nearsightedness, farsightedness, or astigmatism). Hence, measuring the thickness of the cornea - before and after operations - is a necessary examination of refractive surgery, which is also crucial for determining pressure. The inner eye of the eye is known briefly as (IOP), and the device used to visualize the cornea here is the Pachymeter, and this device touches the ultrasound transducer - in it - the cornea. Using those Cutting-edge technology specialists can pick up (echo scheme of the cornea) is described that high visibility. This technique allows access to measure the thickness of the cornea very precisely but also makes sure of the degree of reliability of any measurements obtained by the patient Qrnetth.
Corneal thickness measurement is vital for several procedures and surgeries:
Corneal thickness measurement is essential in treating surgical astigmatism.
It is crucial and necessary to know the corneal thickness suitable for LASIK surgery.
Suspect of glaucoma or glaucoma, as the doctor can prescribe an appropriate treatment for glaucoma, depending on the thickness of the cornea.
The corneal thickness suitable for LASIK is 5 mm minimum.
Eye diseases and surgery:
White water disease:
White water sickness, as it is said in the language of the general or cataract in the term doctors, is a disease difficult to treat except by surgery, by extracting the cataract and implanting a new lens instead of the affected one. This surgery is known as the Phaco, and ultrasound is used to break up the glass that was injured in White water and extracted from the eye, and that by a small wound does not exceed two millimeters and a half millimeters, and this is about the first eye diseases and surgery.
After corneal imaging, either in the advanced or late stages, the doctor may resort to natural corneal transplantation from a deceased donor or artificial corneal transplantation.
Eye diseases and surgery include corneal disorders, which require surgical intervention to treat them, and due to the sensitivity of the site and the large number of problems facing the eyes. It was necessary to examine the patient with high-level techniques; before the patient performs surgeries in the cornea, it is essential to corneal imaging and make appropriate examination tests before Embarking on surgical intervention.
Within eye diseases and surgery, the processes of cornea transplantation are of various forms, whether complete or partial implantation.
Glaucoma or glaucoma:
If talking about eye diseases and their surgery, then it is necessary to talk about glaucoma, which means increased pressure inside the eye, and glaucoma may need surgical intervention if treatment with medications and eye drops does not work.
Blocking of tear ducts:
When talking about eye diseases and surgery, one should not pass without talking about a blocked tear duct, which may be present from birth in a congenital manner. Or is the result of changes in old age, as a result of infection or injury, or even as a result of medications given to cancer patients.
If the patient is young, surgical intervention can restore the vision shared between the eyes, and the earlier the detection of strabismus, the faster the healing process.
Eye socket surgery:
Obstruction of the external eye muscle after the fracture of the eye socket results in strabismus, and this may cause the eyes to become sunken. Fracture of the eye socket may cause duplication of vision, and treatment with medications and antibiotics may help treat the fracture of the eye socket. Doctors resort to a surgical solution except in the case of persistent symptoms resulting from the fracture. If symptoms persist, surgical intervention improves, to install a slide and repair the fracture.