What are the eye muscles? Six eye muscles move the human eye in all directions. There are four straight eye muscles and two oblique eye muscles. Straight eye muscles The four straight eye muscles are flat, thin muscles about one centimeter wide. They pull from the upper, lower, middle, and outer walls of the orbit … Eye muscles: Function & structure
Heterophoria: Strabismus in certain situations Heterophoria is colloquially also called latent or hidden strabismus because it can usually be compensated well. This means that those affected do not have any complaints. The background of the phenomenon is as follows: The individual traction of the eye muscles varies from eye to eye. If you focus on … Heterophoria (latent strabismus): Frequency, Signs
Strabismus: Description Normally, both eyes are always moved together in the same direction. This ensures that a three-dimensional image is created in the brain. However, this balance can be disturbed so that the visual axes deviate from each other, even though the focus is actually on something specific. This is known as strabismus. A manifest … Strabismus (Crossed Eyes): Causes, Therapy
Secondary directions are always oriented to a main direction (fixation). They differ from each other by respectively different spatial values and are significant for the emergence of the spatial sense. A rearrangement of the secondary directions always causes a change in the perception in space. What is the secondary direction? A secondary sense of direction … Secondary Direction: Function, Tasks, Role & Diseases
Strabismus, or strabismus in technical terms, is a misalignment of the eyes that look in different directions. The eyes can be either both looking inward or outward. What is strabismus? Strabismus is not only a “cosmetic blemish” for many sufferers, but there may be a visual impairment involved. In strabismus, because one of the two … Strabismus: Causes, Symptoms & Treatment
Strabology studies all types and effects of strabismus, a misalignment of both eyes relative to each other resulting from disturbances in the balance of the eye muscles. It is a special discipline of ophthalmology and includes prevention, diagnosis as well as therapy of strabismus. It is practiced in eye clinics and most ophthalmologists’ offices. What … Strabology: Treatment, Effects & Risks
Synonyms retinal tumor What is a retinoblastoma? A retinoblastoma is a tumor of the retina (at the back of the eye). This tumor is genetic, i.e. hereditary. It usually occurs in childhood and is malignant. How common is retinoblastoma? Retinoblastoma is a congenital tumor or it develops in early childhood. It is the most common … Retinoblastoma
How is a retinoblastoma inherited? There are two different types of retinoblastoma. On the one hand the sporadic (occasionally occurring) retinoblastoma, which occurs in 40% of cases. This leads to different changes (mutations) in the affected gene and finally to the formation of a retinoblastoma. This usually occurs only on one side and is not … How is a retinoblastoma inherited? | Retinoblastoma
Prismatic glasses can be used to compensate for a particular form of refractive error called hidden or latent strabismus. “Hidden” is the name given to it because the visual deficit is not visible to other people. Health experts believe that about 80% of the population is affected by this limitation. However, it only causes problems … Prism Glasses: Applications & Health Benefits
Farsightedness or hyperopia is an impairment of vision known as hyperopia, which is a deviation from normal vision. What is farsightedness? Schematic diagram showing the anatomy of the eye with myopia and after treatment. Click to enlarge. The term farsightedness is usually used in colloquial usage. Technically accurate, terms such as hyperopia and hypermetropia are … Farsightedness (Hyperopia): Causes, Symptoms & Treatment
About half of all proteins in the human body are glycoproteins. The substances play a role as cell components as well as immune substances. They are formed primarily as part of what is known as N-glycosylation and can cause serious diseases if incorrectly assembled. What are glycoproteins? Glycoproteins are proteins with tree-like branched heteroglycan residues. … Glycoproteins: Function & Diseases
The optic nerve is formed by approximately one million nerve fibers. These nerve fibers are grouped into bundles and meet about 10 to 15 millimeters behind the eyeball with the central artery of the retina and the vein. Together, the vessels then move forward in the interior of the nerves to the optic nerve head … Causes of optic atrophy
