Retina
The retina is a thin membrane at the back of the eye, essential for visual perception. It plays a central role in transforming light into nerve signals, which the brain then interprets as images. Although often misunderstood by the general public, the retina is at the heart of numerous ocular pathologies that can significantly affect vision.
What is the role of the retina?
The retina functions as a highly sophisticated light sensor. It is made up of millions of light-sensitive cells - cones and rods - which capture light and contrast. The cones are mainly responsible for color and detail vision, while the rods are involved in night and peripheral vision. Once light information has been captured, it is transmitted to the optic nerve and then to the brain, which interprets it.
Common retinal diseases
Age-related macular degeneration (AMD) It affects the central area of the retina (macula) and affects fine vision;
Diabetic retinopathy A complication of diabetes that alters retinal blood vessels;
Retinal detachment Retinitis: an ophthalmological emergency in which the retina detaches from the inner wall of the eye;
Retinal vein occlusions circulation disorders in retinal vessels.
Retinal surgery
Retinal surgery is a specialized procedure designed to treat certain retinal pathologies, such as retinal detachment, macular holes or complications associated with diabetic retinopathy. It is generally performed under a microscope and may include techniques such as vitrectomy, which removes the vitreous gel from the eye to access the retina, or the use of lasers to seal lesions. These procedures require great precision and are often performed in hospital. The choice of surgery depends on the nature and severity of the retinal damage, and the general condition of the eye.
Symptoms to watch out for
Retinal disorders can cause a variety of symptoms, including :
Sudden or progressive loss of vision;
The appearance of dark spots or blurred areas;
Deformations of straight lines (metamorphopsias);
Flashes of light or floating bodies (myodesopsias).
These signs require prompt consultation with an ophthalmologist.
Prevention and screening
Regular monitoring of eye health, especially from the age of 50 or in the case of chronic diseases such as diabetes, is essential for early detection of retinal disorders. Examinations such as the fundus or OCT (optical coherence tomography) enable precise observation of the retina.
