Retinitis pigmentosa is a genetically determined degeneration of the retina, in which the photoreceptors of the eyes perish bit by bit and thus in the late course of the disease usually complete blindness occurs. Frequently, this phenomenon is only one symptom of several and, together with the respective accompanying symptoms, forms an entire symptom complex, … Retinitis Pigmentosa: Causes, Symptoms & Treatment
Not only adults of different age groups suffer from an existing visual impairment. Even very young children and newborns can already develop a visual impairment. What is a visual impairment? A visual impairment is considered to be a more or less intense impairment of vision or the ability to perceive visually. Without treatment, a visual … Visual Impairment: Causes, Symptoms & Treatment
In medicine, there are many different types of visual impairment. Some are already congenital, others are acquired. In either case, low vision should be corrected to prevent further damage to the eye and provide a better quality of life for those affected. What is low vision? Schematic diagram showing the anatomy of the eye with … Low Vision: Causes, Treatment & Help
Blindness refers to a complete or near loss of vision. Although blindness is often irreversible, partial therapeutic success is possible. What is blindness? Blindness is described as a visual impairment in which a person’s vision is either nonexistent or very severely impaired. If the definition of blindness is based on German legislation, blindness exists, among … Blindness: Causes, Symptoms & Treatment
Age-related macular degeneration, age-related macular degeneration or AMD for short, is a progressive damage of the epithelial tissue (pigment epithelium) and the photoreceptors in the retina. The damage of the tissue leads to a loss of function and thus to a severe reduction of visual acuity in old age. The following text discusses the definition, … Age-related Macular Degeneration: Causes, Symptoms & Treatment
A not inconsiderable number of people suffer from them, fear of it, however, in any case most. After all, who wants to have limited eyesight or even lose it completely in the worst case? But the knowledge about the diseases is mostly limited to generalities. For this reason, the purpose of this article is to … Eye Diseases: when the Eyes Suffer
The terms red-green deficiency, red-green visual impairment, or red-green blindness are the technical terms for the most common color vision deficiencies, known colloquially as color blindness. Contrary to popular belief, those who are red-green blind are not necessarily incapable of recognizing these two colors; there may also be a weakness in discrimination. What is red-green … Red-green Deficiency: Causes, Symptoms & Treatment
Grass is green, ripe tomatoes are red. For many people, these color designations remain colorless terms throughout their lives. Eight out of 100 men, but only one out of 200 women know some colors only by hearsay. Color vision deficiency – colloquially often simplified as color blindness – can have many manifestations. Red-green deficiency is … Color Vision Deficiency (Color Blindness): Causes, Diagnosis, Therapy
Synonyms in a broader sense Medical: Achromatopsia, Achromasia Introduction With total color blindness, no colors at all can be perceived, only contrasts (i.e. light or dark). Often red-green blindness is also erroneously called color blindness, although it is a color blindness (color anomaly). A distinction is made between two forms: congenital color blindness and acquired … Color blindness
Symptoms The cones are not only important for color vision, but especially for sharp vision, since the retina contains only cones at the point of sharpest vision, the yellow spot, with which we usually fixate points. The rods do not offer by far the same resolution as the cones, but they are more sensitive to … Symptoms | Color blindness
How do you test children? In order to diagnose color blindness (achromasia) in children, tests can be used for examination from about the age of three years. However, the tests are not very different from those used for adults. A typical test is the Ishihara Color Chart. It is used to test whether the children … How do you test children? | Color blindness
Relevance for the driver’s license In fact, a color sense disorder rarely leads to a restriction of participation in traffic. Color-blind people are allowed to obtain a driver’s license and drive a car. Color blindness primarily comprises red-green vision deficiencies. Only a complete loss of color sense (achromatopsia) leads to restrictions. In this case there … Relevance for the driver’s license | Color blindness