Artificial lens, which is now used in the cataract surgery as a replacement for the body’s natural lens in the interior eye. One fferentiates the posterior chamber lens (standard) and anterior chamber lens, foldable lenses (made of acrylic or silicone) and rigid lenses (Plexiglas).
An inflammation of the cornea (keratitis) can be caused by an infection with a pathogen, but also be caused by non-infectious causes. Mainly an flammation caused by bacteria can develop a corneal ulcer, which in extreme cases can penetrate into the anterior chamber of the eye.
Nearsighted or myopic can see distant objects worse than nearby objects. The light which comes from a distance, is too strongly refracted the cornea and lens, and therefore the focal point of the eye lies in front of the retina. If the light comes from nearby, it is focused properly on the retina. Therefore, a nearsighted can see well up close.
From approximately the age of 45 the ability to see sharply up close noticeably decreases. The lens of the eye loses its elasticity, and the ability to cus is reduced. Reading glasses is then necessary.
“The secondary cataract is the most common “side effect” of the cataract surgery. It consists of a thin layer cell that grows behind the tificial lens, and can increasingly degrade the visual acuity after a successful cataract surgery.”
The vitreous body (corpus vitreum) is a component of the eye of vertebrates. To obtain the shape of the eye, they contain a gel-like, translucent bstance, the vitreous body. The vitreous body is located between the lens and the retina. Consequently light, the collected from the lens passes through the vitreous. on its way to the retina The vitreous body is composed of approximately 98% water as well as about 2% hyaluronic acid and a network of collagen fibers.