The abducens nerve is the VIth cranial nerve. It is responsible for the movement of the eyeball. It is composed primarily of motor fibers and innervates the lateral straight muscle. What is the abducens nerve? The abducens nerve is the VIth of the total XII. Cranial Nerves. Like most other cranial nerves, it supplies areas … Abducens Nerve: Structure, Function & Diseases
A person’s tear flow is a natural and important process. The healthy function of tear formation is of considerable importance not only for physical health, but also for mental health. What is tear flow? Tear flow is generally understood to be the formation of a mirror-like tear film that stretches protectively over the cornea of … Lacrimal Flow: Function, Tasks, Role & Diseases
Definition The papilla is an area on the retina of the eye. This is where all the nerve fibers of the retina converge and leave the eyeball as a bundled nerve cord in order to be able to transmit the sensory impressions of the eye to the brain. Anatomy The papilla is a circular area … Papilla
Papilloedema Papilledema, also called congestion pupil, is a pathological bulge of the optic nerve head, which is normally slightly convex. Unlike optic disc excavation, pressure from behind on the optic nerve is increased, causing it to bulge forward. The causes of papilledema can be very diverse. In addition to the optic nerve, numerous arteries and … Papilloedema | Papilla
The term refractive surgery serves as a collective term for eye surgeries in which the overall refractive power of the eye is changed. In this way, the patient no longer needs glasses or contact lenses. What is refractive surgery? The term refractive surgery serves as a collective term for eye surgeries that alter the overall … Refractive Surgery: Treatment, Effect & Risks
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
It is known that the pupil changes as soon as it is confronted with high or low light exposure. The effect occurs, for example, when someone comes out of bright daylight into a dark room. In this way, the eye always adapts to its environment. This is the pupillary reflex, also known as light or … Pupillary Reflex: Function, Tasks, Role & Diseases
Introduction An inflammation of the optic nerve, also known as neuritis nervi optici or retrobulbar neuritis among doctors, is an inflammation of the optic nerve, the “optic nerve”, usually caused by autoimmunological processes. Autoimmunological means that the body’s own natural defense mechanisms, which are normally only directed against foreign substances and pathogens, are now, for … Causes of optic nerve inflammation
Symptoms The typical symptoms of “Neuritis Nervi Optici” are visual disturbances and/or visual impairment, visual field failures as well as reduced contrast and color perception and of course eye pain. The first thing that those affected notice is the loss of visual acuity, i.e. increasing poor and blurred vision. This is often accompanied by headaches … Symptoms | Causes of optic nerve inflammation
Definition – What is the dermis? The eye consists of the outer eye skin, which can be divided into two sections – the opaque sclera and the translucent cornea. The main part of the eye skin is formed by the strong sclera. The white sclera consists of firm connective tissue and envelops almost the entire … Sclera of the eye
Function of the dermis The main function of the sclera is to protect the eye, or rather, to protect the sensitive interior of the eye. Especially the vulnerable choroid, which is located underneath the sclera, is protected by it. It needs this protection because it is responsible for the blood supply of the eye and … Function of the dermis | Sclera of the eye
Crushing of the dermis The eye can be bruised or squeezed by a mechanical force from outside, such as a fist punch, a ball, a stone throw, etc. or by a storm. It is possible that the eye carries a serious injury of it, which can affect the eyelid, conjunctiva, cornea and sclera. Usually a … Crushing of the dermis | Sclera of the eye
