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Retreatment in ophthalmic refractive surgery

A technology for ophthalmic surgery and treatment devices, applied in the field of generating control data for treatment devices, in the field of ophthalmic surgery, it can solve the problems of difficult and expensive preoperative incision measurement

Active Publication Date: 2019-12-17
CARL ZEISS MEDITEC AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011]However, measurements of preoperative incisions have proven to present a series of practical difficulties
It is therefore reasonable to conclude that state-of-the-art remedial methods do not always yield optimal results on the one hand and are quite expensive on the other

Method used

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  • Retreatment in ophthalmic refractive surgery
  • Retreatment in ophthalmic refractive surgery
  • Retreatment in ophthalmic refractive surgery

Examples

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Embodiment Construction

[0034] Treatment devices for ophthalmic surgery such as figure 1shown, and bear the general reference number 1. The treatment device 1 is designed for introducing a laser incision in the eye 2 of a patient 3 . For this purpose, the treatment device 1 has a laser device 4 which emits a laser beam 6 from a laser source 5 which is guided as a focused beam 7 into the eye 2 or into the cornea of ​​the eye. Preferably, the laser beam 6 is a pulsed laser beam with a wavelength between 300 nanometers and 10 micrometers. Furthermore, the pulse length of the laser beam 6 is in the range between 1 femtosecond and 100 nanoseconds, wherein the pulse repetition frequency is 200 to 20000 kHz and the pulse energy can be between 0.01 microjoule and 0.01 millijoule. Thus, the treatment device 1 produces a cut plane in the cornea of ​​the eye 2 by deflecting the pulsed laser radiation. Accordingly, a scanner 8 and a radiation intensity modulator 9 are also provided in the laser device 4 or it...

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Abstract

The invention relates to a planning device for generating control data, a treatment device for refractive ophthalmic surgery and a method for generating control data for such a treatment device which enables better Complementary refractive correction. In this case, the planning device includes a calculation unit for determining the corneal cutting plane for the retreatment, wherein the calculation unit is designed to take into account changes in the thickness of the epithelium, which are mainly caused by previous treatments, during the calculation. .

Description

technical field [0001] The invention relates to a planning device for generating control data for a treatment device which generates at least one cutting plane in the cornea by means of a laser device. The invention also relates to a treatment device having a planning device of the type described above. [0002] The invention also relates to a method for generating control data for a treatment device that produces at least one cutting plane in the cornea by means of a laser device. [0003] Finally, the invention also relates to a method for ophthalmic surgery, in which at least one cutting plane is produced in the cornea by means of a treatment device with a laser device. Background technique [0004] Various treatments are known in the prior art with the aim of correcting the refraction of the human eye. The purpose of the surgical approach is to make targeted changes to the cornea in order to affect the refraction of light in the eye. For this purpose, various surgical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F9/008
CPCA61F9/00827A61F9/00836A61F9/0084A61F2009/00872A61F2009/0088A61F2009/00882A61F2009/00861A61F2009/00897
Inventor 艾哈迈德·西德基马克·比朔夫马蒂亚斯·沃特克
Owner CARL ZEISS MEDITEC AG
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