The farsightedness or presbyopia is a normler process by which almost all normalsichtigen people are affected. The elasticity of the lens decreases with age and as a result, the refractive power of the lens is changed. That may entail seeing objects that are close to the eye, not more keenly. Especially the combination of lens and cornea is significant for the proper sharp appearance. The lens is an integral part of the eye. It is curved on both sides outwards (biconvex) and consists mostly of proteins and water. Depending on the curvature of the lens, the breaking strength in a way changed so that objects in the vicinity (short-sighted) or in the distance (farsighted) sharp.
The change of the curvature of the lens is also known as accommodation. The lens is pregnant, we are able to see things in the vicinity (for example when reading) sharp. The elasticity of the lens makes this possible off balls with increasing Vault. Hot to see objects in the distance, the lens by setting her when in the length and width is drawn, so flattened. The lens is supplied by the surrounding aqueous humor, which is located in the eye to the lens around. The lens has no blood vessels, and is completely transparent and colorless. The off approx. Middle of the process of the kugelns of the lens obstructed 40 incoming farsightedness.
The elasticity, which is a prerequisite for the curvature of the lens, is lost with age. Thus, also the Akkomodationsfahigkeit decreases steadily. People with an farsightedness existing at the younger age notice this process earlier. So, the refractive error of the farsightedness is a completely natural process due to the decreasing elasticity of the lens. Can a farsightedness are treated with a laser eye procedure? A method that increasingly is used, is the so called Monovision LASIK. Monovision is a State different refractive conditions by right and left eye. One eye can see objects near each sharp objects in the distance, the other eye. The brain adapts automatically to the respective fixed subject and summarizes the different visual impressions. A Monovision can be congenital or through a pair of glasses, contact lenses or just a LASIK operation are achieved. The age far-sighted patient the Ametropia corrects at the guiding eyes completely, so that an optimized vision in the distance is possible with this eye. The other eye is corrected but only partially, which means a certain myopia remains or – at previous hyperopia – brought about. This eye is now used for the close-ups. The Mono vision generated in this way requires an active participation by the brain, because it constantly needs to handle the difference in perception. Prerequisite for the success of the Mono vision LASIK is the optimal combination of both eyes. To check this, the result should be the Monovison before the LASIK surgery are simulated (for example with contact lenses). If the simulation is successful and the constraint of spatial vision as not disturbing is perceived, the Mono vision LASIK can perform surgeon with the laser. To read some small texts, as well as driving under limited lighting glasses can however be necessary.