PRESBYOPIA

What is Presbyopia?

When the optical system of the eye Ages, there is a constant loss of the ability to move the focus from distance to near. For the patient it is an increasing far-sightedness. Presbyopia (age-related far-sightedness) usually starts in the mid 40ies with a focus deficit below 1 dioptre. This value increases to 3 dioptres above the age of 65. The common way to treat presbyopia is wearing reading glasses or, if there is also another refractive error present, wearing progressive glasses. Multifocal contact lenses do usually not work well since they have to move at the corneal surface to avoid corneal malnutition and related corneal damage. Surgical solutions include a corneal implant with pinhole function and corneal implants with an optically active interface between cornea and implant. Also intra-ocular solutions are available as multi-focal intra-ocular lenses (multifocal IOL) which is used after cataract surgery or clear lens extraction.

Multi-focal.vision: The DIOPTEX Multifocal Cornea Project

The MFC corneal inlay is currently under development and designed to treat presbyopia in a minimally invasive, painless, safe, effective and easily reversible way. The solution avoids the shortcommings of existing surgical solutions: Optically active interfaces between cornea and inlay which may after a certain time result in dense haze formation in the active optical center and consequently in significantly reduced vision.

Pilot Study: On the right (top) one can see the topographical difference between the preoperative and postoperative situation. The picture clearly shows that the required addition of some 2.5 dioptres for multifocal near-vision can be established by that most innovative technology. The other picture on the right (bottom) shows, how the eye looks like under the surgical microscope at the end of the surgery (end of the video). The circular line inside the pupil defines the border between the near-vision and distance-vision zone. The inlay is not visible because it is so tiny (0.3 mm) and hidden behind the corneal light reflex. The distance-vision zone is located between the near-vision zone border and the margin of the pupil. The treatment is quick and easy to perform and absolutely painless and reversible.

postop - preop