What is lens opacity? The clouding of the lens is also called cataract. In Germany, the absolutely most common form is age-related lens clouding. Due to a number of factors, such as injuries, diabetes, radiation and mostly age, clouding of the lens occurs. As a result, vision is significantly reduced. Those affected describe the symptoms … What is lens opacity? | Lens of the eye
Can you see without a lens? The main task of the lens is to adjust the refractive power of the eye. By deforming the lens it is possible to fix individual objects precisely. However, the lens is not the only part of the eye that can bundle incident light rays. It is not the lens … Can you see without a lens? | Lens of the eye
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
Synonyms iris, “eye color Definition The iris is the diaphragm of the optical apparatus of the eye. It has an opening in the center which represents the pupil. The iris consists of several layers. The amount of pigment (dye) incorporated into the iris determines the color of the eye. By varying the size of the … Iris
Physiology The iris has the function of an aperture and regulates the incidence of light in the eye. It has a hole in the middle, which represents the pupil. The size of the pupil depends on the time of day or brightness on the one hand, and on the activity of the autonomic nervous system … Physiology | Iris
How does the color of the iris come about? The color of the iris is determined by the dye melanin. This dye serves as light protection in eyes and skin. Melanin has a brownish color and absorbs incident light. A different colored pigment is not produced by humans. Originally, therefore, probably all people had brown … How does the color of the iris come about? | Iris
Definition The optic nerve (med. Nervus opticus) is the strand of “nerve fibers” that transmits signals generated on the retina of the eye to the brain. Strictly speaking, the optic nerve, which doctors refer to as the nervus (Latin for nerve) opticus, is not actually a real nerve at all, but a “pathway” of the … The Optic Nerve
Anatomy of the eye Task of the optic nerve As with all nerves, the basic task of the optic nerve is to transmit electrical signals. The conversion of external light impressions into these electrical signals is done by a series of biochemical processes within the nerve cells of the retina. From there, they are then … Anatomy of the eye | The Optic Nerve
How is the optic nerve examined? During the examination of the optic nerve, the visual acuity, the field of vision and the fundus of the eye are usually checked. Visual acuity can be checked using standardized charts. These must be read from a distance of five meters, with the font size decreasing with each new … How is the optic nerve examined? | The Optic Nerve
Diseases of the optic nerve The most common cause of damage to the optic nerve is an accident or violent impact (traffic accidents or similar) in which the optic nerve is squeezed or pulled, for example when entering the skull. Bleeding into the orbit of the eye (e.g. after blows to the eye with a … Diseases of the optic nerve | The Optic Nerve
How does a damaged optic nerve regenerate? The injury of the optic nerve is a very sensitive topic in medicine, as the prognosis is usually unfortunately rather poor. Until now, it has been believed that nerves in general are hardly able to regenerate. There are various studies that show, especially in animal models, that partial … How does a damaged optic nerve regenerate? | The Optic Nerve
