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Amazing imaging technology: How to see through the depths of your eyes?
In the rapid development of medical imaging, technological innovation in the field of ophthalmology is undoubtedly the most eye-catching.Especially the optic nerve head deep in the pupil, also known as the optic disc, not only carries the nerve fibers of retinal neurons, but also serves as a diagnostic target, allowing doctors to detect the health of the eyes.What kind of mystery is hidden in your eyes?
The disc is an important structure of the eye, and there are no rods or cones in this area, thus forming a small blind spot for each eye.
The optic nerve head is located inside the eyeball and is the exit point of neural signals, which transmits information to the brain through the optic nerve.The number of nerve fibers here can reach 1 million to 1.2 million, and it is also the entrance and exit of the main arteries and veins that supply the retinal blood.
Structure and Function
The optic nerve head is usually located on the nose side of the fovea, with a diameter of about 1.76 mm to 1.92 mm, and contains a central depression of various shapes called the optic cup.The shape of the optic disc is of great significance in the diagnosis of diseases. Doctors must carefully observe the changes in the shape of the pod from shallow concave to the pod.
The optic nerve head acts as the outlet point for nerve fibers to help evaluate the health status of the eye.
Modern direct fundus lenses can view the view disc through the principle of reversibility of light.Further inspection requires the use of a slit lamp biological microscope and appropriate aspherical lens to obtain a more detailed stereoscopic image.Through such examinations, ophthalmologists can observe a variety of abnormalities, such as the color of the optic nerve, cup-and-tray ratio, edge clarity, and any swelling or bleeding.
Clinical significance
Abnormal changes in the optic disc are often associated with a variety of eye diseases, especially glaucoma and other optic neuropathies.If the optic disc appears pale, this may be an indicator of some diseases.In pregnant women, especially in preeclampsia, this type of examination is crucial to detect signs of elevated intracranial pressure early.
The color of the visual disc ranges from orange to pink, and if pale is found, it may indicate disease.
Evolution of Imaging Technology
Traditional color negative photography is still the standard for examining visual disks, but nowadays, many automation technologies have been developed, such as Heidelberg retinal scanning (HRT) and optical coherence tomography (OCT). These computerized technologies can not only be meticulously used in detail. The intraocular structure can also be drawn and quantitatively analyzed.
These imaging technologies can be statistically correlated with a database of normal populations that have been screened in the past, helping doctors track minor changes in the eyes.However, the imaging results alone are still not enough to confirm the diagnosis, and doctors still need to conduct a final evaluation of the results of physiological tests.
Exceptional Condition
In the case of abnormal view disk, there are several features that need to be paid attention to.For example, "large visual disc" is a non-progressive state, with the diameter of the visual disc exceeding the normal value, while "morning optical disc abnormality" is a congenital abnormality.The presence of these conditions may suggest developmental problems in the eye, or potential nerve damage.
This means that the optic disc is not only a part of the eye, but also a key observation point for many neurological conditions.With the advancement of imaging technology, from non-invasive near-infrared laser Doppler imaging systems to detailed analysis of blood flow in the eye, we have provided us with more comprehensive visual disc examination methods.
Future Outlook
In the future, with the continuous innovation of technology, we may be able to interpret health signals in the eyes more accurately and achieve earlier disease detection.How to use these cutting-edge imaging technologies to improve ophthalmic diagnosis and treatment, are you ready to face these upcoming changes?
