Synonyms English: blind spot Introduction A blind spot is the area of the eye that does not contain any sensory cells that can receive light, so that a certain area cannot be seen. The blind spot occurs naturally in both eyes. To test your blind spot Anyone can easily experience the position and effects of … Test your blind spot
Explanation of the blind spot There are no visual cells at the blind spot, so the brain actually lacks any image information at this point. You may have noticed that the blind spot is not perceived as completely empty or black. Instead, the brain uses the information from the surrounding visual cells to compensate for … Explanation of the blind spot | Test your blind spot
Definition In iris heterochromia, the color of one eye is different from the other. In humans it occurs only very rarely. Sometimes heterochromia can be an indication of a disease. This is especially the case with a new heterochromia. More often, central heterochromia occurs, in which a ring in the middle of the iris differs … What is iris heterochromia?
Frequency The different forms of heterochromia also differ strongly in their frequency. A complete iris heterochromia is very rare. Because of the rarity it is very difficult to find exact details. However, some sources indicate that a true congenital iris heterochromia without disease value occurs only in 4 out of 1 million people. The Waardenburg … Frequency | What is iris heterochromia?
Is this combined with diseases? Iris heterochromia can, but does not have to occur as part of a disease. Iris heterochromia, which is congenital and does not present with any other symptoms, is usually a completely harmless freak of nature. However, iris heterochromia can also occur in some genetic diseases such as Waardenburg syndrome. Here … Is this combined with diseases? | What is iris heterochromia?
Synonyms Medical: retina Introduction The retina is a part of the eye and consists of several layers containing cells that absorb, convert and transmit light stimuli. It is responsible for color and brightness vision and finally forms the optic nerve, which transmits the impulses to the brain. For the different colors and light intensities, the … Retina of the eye
Tasks of the retina The retina of the eye, also known as the retina, is responsible for transmitting stimuli to the brain. It is therefore responsible for ensuring that what we see is perceived as an image. The light must first pass through the cornea, the lens and the vitreous body of the eye before … Tasks of the retina | Retina of the eye
Diseases of the retina In general, diseases of the retina are painless because there are no pain fibers in the retina. A retinal detachment results in a separation of the retina from the choroid, which is rich in vessels. A space is formed in which fluid accumulates. As a result, the retina can no longer … Diseases of the retina | Retina of the eye
Retinal Exam After you have described the corresponding symptoms of inflammation, tearing or detachment of the retina to your ophthalmologist, the first thing he or she will do is perform an eye test. This will allow the ophthalmologist to assess the extent of the damage in terms of vision. In the following, the posterior wall … Retinal Exam | Retina of the eye
How can the pupillary reflex be tested? The examination of the pupillary reflex is one of the standard examinations in neurology. The pupillary reflex can be tested by means of a flashlight examination. This involves illuminating one eye and examining the reaction of both eyes. If deviations occur, this is called anisocoria. Normally, the doctor … How can the pupillary reflex be tested? | The pupil reflex
What is the convergence reaction? The term convergence reaction describes the reflex process of the eye when the focus changes from a distant object to a near object. On the one hand, this results in a convergence movement of the eyes. This means that the pupils of both eyes are directed towards the center line … What is the convergence reaction? | The pupil reflex
The pupillary reflex describes the involuntary adaptation of the eye to changing light conditions. The width of the pupil changes reflectively with incident light. This reflex is controlled by the parasympathetic nervous system and plays an important role in visual acuity and in the protection of the retina. If the environment is very bright, the … The pupil reflex