| 摘要 |
The invention relates to a method for the minimal- to non-invasive optical treatment of tissues of the eye and for diagnosis thereof and device for carrying out said method. The aim of the invention is achievement of a method and laser arrangement for the minimal- to non-invasive optical treatment within the eye interior, in particular of defective vision by ablation of tissue, characterised by a precision previously unattained with a cut width in the region of less than 2 mu m, without a significant mechanical disturbance of the surrounding tissue caused by the photodisruption. Said method and arrangement shall be economical and easy to operate. Furthermore, the arrangement shall also permit a three-dimensional imaging of the tissue. Said aim is achieved by means of a method in which the ablation occurs by means of focussed, planar or spatial scanning, whilst retaining the same order of magnitude for focussed point diameter and point separation of under 5 mu m, with a radiation in the spectral range from 500 nm to 1200 nm. Permanent changes due to energy dissipation beyond the point diameter are avoided and disturbance of the tissue is essentially limited thereto, whereby the impulse duration is in the order of femtoseconds an the energy of the individual pulses is in the order of nanojoules. The invention finds application in the field of ophthalmology. |
