Hydrophthalmos is the term used for enlargement of one or both eyes that is due to impaired aqueous humor outflow. Hydrophthalmos is associated with the congenital form of glaucoma. It is treated surgically. What is hydrophthalmos? The eye is a part of the central nervous system and enables visual impression through receptors and their connection … Hydrophthalmos: Causes, Symptoms & Treatment
Carotid stenosis is the narrowing of the carotid artery, which supplies oxygen and nutrients to the brain. The condition is caused by deposits in the artery. Carotid stenosis is one of the most common causes of stroke. What is carotid stenosis? Smoking and little exercise are huge contributors to stroke. Carotid stenosis is a narrowing … Carotid Artery Stenosis: Causes, Symptoms & Treatment
Retinoblastoma is a malignant, mutation-related retinal tumor that occurs primarily in young children and affects both sexes with equal frequency. If diagnosed early and therapy is started, retinoblastoma is curable in most cases (about 97 percent). What is retinoblastoma? Retinoblastoma (also glioma retinae, neuroblastoma retinae) is a malignant (malignant) retinal tumor that usually occurs in … Retinoblastoma: Causes, Symptoms & Treatment
Retinopathia centralis serosa is often referred to as “manager’s disease” by ophthalmologists. The reason is that a lot of stress can trigger this vision disorder. In this case, a gray spot appears in the visual field, objects are seen distorted, and reading and recognizing colors are difficult. What is retinopathy centralis serosa? Retinopathia centralis serosa … Retinopathia Centralis Serosa: Causes, Symptoms & Treatment
A pituitary tumor is a predominantly benign growth of the pituitary gland that accounts for about 30 to 40 percent of brain tumors. Pituitary tumors are usually easily treatable due to modern microsurgical procedural techniques. What is a pituitary tumor? Schematic diagram showing the location of a brain tumor in the brain. Click to enlarge. … Pituitary Tumor: Causes, Symptoms & Treatment
Fixation lets a person look specifically at an object or subject in external space and is made possible by the retinal site of highest resolution. This so-called fovea centralis represents the main direction of vision. Disorders of fixation are present, for example, in strabismus. What is fixation? By the term fixation, ophthalmology refers to the … Fixation: Function, Tasks, Role & Diseases
Vitreous hemorrhage can have several causes. In many cases, medical treatment is limited. However, hemorrhages often resolve on their own. What is a vitreous hemorrhage? In a present vitreous hemorrhage, blood enters the so-called vitreous cavity of the human eye. The vitreous humor occupies about 80% of the available space in the human eyeball and … Vitreous Hemorrhage: Causes, Symptoms & Treatment
Brain tumors are very rare, with only about 2 percent of all new cancer cases affecting the brain. However, when a brain tumor is diagnosed, it is a so-called astrocytoma in about a quarter of all cases. This makes astrocytomas among the most common cancers of the brain. Their degrees of severity, as well as … Astrocytoma (Glioblastoma): Causes, Symptoms & Treatment
Visual disorders are, as the name itself suggests, disturbances of vision or the eye. Thereby, the impairment of vision can have many forms. Visual disorders are not infrequently a symptom of an underlying disease. Visual impairments are generally understood to be long-lasting or chronic visual disturbances. What are visual impairments? Because visual disturbances often occur … Vision Problems: Causes, Treatment & Help
Toxoplasmosis is a disease which is transmitted from animals to humans. This so-called zoonosis, is thereby relatively harmless to the host (human), as long as this is not either sick with HIV, or pregnant. What is toxoplasmosis? People with poorly functioning immune systems (e.g., due to HIV) become severely ill with this disease, which is … Toxoplasmosis: Causes, Symptoms & Treatment
What is macular dystrophy? Macular dystrophy is a disease of the retina, which is limited to the area of the macula (site of acuity) and leads here to a degenerative (destructive) process. It is hereditary and mostly affects both eyes and thus causes characteristic symmetrical, bilateral changes in the retina. However, macular dystrophy can also … Macular dystrophy
Near fixation is the visual concentration on a stimulus in the immediate vicinity. The optic pit is the retinal point of sharpest vision and is used for fixation. In addition to the visual pit, the near accommodation of the eye is required for near fixation. What is near fixation? In medicine, near fixation is the … Proximal Fixation: Function, Tasks, Role & Diseases