Corneal curvature: description The cornea is the foremost portion of the eyeball that lies in front of the pupil. It is slightly oval in shape, slightly smaller than a 1 cent piece and about half a millimeter thick. Since it rests on the round eyeball, it is itself spherically curved, much like a contact lens. … Astigmatism: Signs, Diagnosis, Treatment
An intraocular lens is an artificial lens that is inserted into the eye during a surgical procedure. The artificial lens remains in the eye permanently and significantly improves the patient’s vision. What is an intraocular lens? An intraocular lens is an artificial lens that is inserted into the eye during a surgical procedure. Intraocular lenses … Intraocular Lens: Function, Task & Diseases
Keratoconus is a progressive thinning and deformation of the cornea of the eye (cornea). A cone-shaped protrusion of the cornea takes place. Keratoconus is often accompanied by other diseases and, in some cases, genetic disorders. What is keratoconus? Keratoconus is characterized by the cone-shaped deformation and thinning of the cornea of the eye. Both eyes … Keratoconus: Causes, Symptoms & Treatment
Keratoplasty is the term used to describe an operation on the cornea of the eye. In this procedure, a corneal transplant takes place. What is keratoplasty? Keratoplasty is the name given to an operation on the cornea of the eye. In this procedure, a corneal transplant takes place. Keratoplasty is one of the eye surgeries. … Keratoplasty: Treatment, Effect & Risks
Dermotrichia syndrome is a disease that usually has genetic causes. Consequently, affected patients suffer from dermotrichia syndrome from birth. At the same time, previous observations show that the disease occurs on average only with low frequency in individuals. Dermotrichia syndrome is essentially characterized by three typical complaints. These are alopecia, ichthyosis and photophobia. What is … Dermotrichia Syndrome: Causes, Symptoms & Treatment
Not only adults of different age groups suffer from an existing visual impairment. Even very young children and newborns can already develop a visual impairment. What is a visual impairment? A visual impairment is considered to be a more or less intense impairment of vision or the ability to perceive visually. Without treatment, a visual … Visual Impairment: Causes, Symptoms & Treatment
Visual acuity is the sharpness with which a visual impression from the environment is imaged on the retina of a living being and processed in its brain. Factors such as receptor density, receptive field size, and the anatomy of the dioptric apparatus affect visual acuity in individual cases. Macular degeneration is one of the most … Visual Acuity: Function, Tasks, Role & Diseases
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
Myopia causes blurred vision when looking into the distance. Myopia can have different causes and is treated accordingly in different ways. What is myopia? Myopia is a refractive error in which objects that are far away from the observer are seen out of focus. In contrast, when myopia is present, things that are close to … Nearsightedness (Myopia): Causes, Symptoms & Treatment
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
To be able to see sharply again – without glasses or contact lenses – that is what LASIK promises. LASIK (laser in situ keratomileusis) is a laser eye surgery procedure performed since 1990. The goal is the correction of optical refractive errors. LASIK is in demand: in Germany alone, the number of laser eye surgeries … LASIK: Treatment, Effect & Risks
