Our core competency – ophthalmology
In conjunction with femto, excimer, Nd:YAG or argon ion lasers, our key components and subsystems are employed in the following areas:
LASER-ASSISTED IN SITU KERATOMILEUSIS (LASIK)
Corrective surgery for myopia and hyperopia by means of Femto laser assisted corneal flap cuts.
This method is used to treat myopia of up to approx. -8 dpt., hyperopia of up to approx. +4 dpt., and astigmatism of up to approx. 5 dpt.
The laser beam is focused approx. 0.1 mm deep in the cornea to produce a 9-mm diameter corneal lamella. This flap is then lifted and the cornea carefully examined (using an aberrometer) before being “abraded” by the excimer laser to correct the refractive error. The corneal lamella is then folded back into place.
For the treatment of capsular opacification following cataract surgery.
Cataract surgery can lead to vision problems in the form of lens opacity on the posterior capsule. If this occurs, a laser beam is used to open the posterior capsule and restore full vision.
For the treatment of cataracts or extremely defective vision.
A circular incision is made to open the lens capsule (capsulotomy) and the center of the lens is crushed (= fragmented). Small incisions are then made on the edge of the cornea in order to extract the lens fragments and insert the new artificial lens.
If astigmatism is also present, this is then treated by means of crescent-shaped incisions in the cornea.
Corrective surgery for corneal deformation.
Astigmatism is a refractive error caused by distortion of the cornea. Due to this distortion, light is picked up as linear bars rather than being focused as a single point on the retina, thereby resulting in blurred or partially blurred vision.
Astigmatism treatment is often performed in conjunction with other operations. The treatment involves making crescent-shaped incisions to correct the curvature of the cornea.
Flapless LASIK treatment (SMILE®)
Flapless LASIK treatment for correcting myopia by means of lenticule extraction (SMILE® – Small Incision Lenticule Extraction).
Using this method, there is no longer a need for flap incision; instead, a refractive lenticule is created using the laser and then removed by making an incision measuring just a few millimeters. This leaves the upper corneal layers largely unaffected and reduces the risk of ‘dry eye syndrome’, which is commonly associated with the standard LASIK operation. In general, the cornea remains more stable using this method of treatment.
SMILE® is a registered trademark of Carl Zeiss Meditec AG.
PRESBYOPIA CORRECTIVE SURGERY
Corrective surgery for presbyopia.
The continued growth of the lens leads to loss of elasticity with age. Besides implants and add-on lenses, new methods for future treatment are emerging that allow the lens to be retained. By making various micro-incisions, the surgeon can restore the flexibility of the lens and correct the presbyopia.