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Ophthalmic surgical apparatus

A technology for ophthalmic surgery and eyes, which is applied in the field of ophthalmic surgical devices, and can solve the problems of high cost and no significant reduction in operation duration

Inactive Publication Date: 2018-03-30
阿尔法诺夫光学和激光技术中心 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] Finally, the cost of femtosecond laser-assisted cataract surgery systems remains high without significant reduction in surgery duration

Method used

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Embodiment Construction

[0047] equipment

[0048] Many LASIK-type corneal surgery devices or cataract surgery devices (FLAC) are based on femtosecond lasers. The term femtosecond laser here refers to a laser that emits light pulses of duration between one and several hundred femtoseconds. It is generally recommended to reduce the duration of the pulse for cutting the transparent tissue of the anterior segment of the eye. In fact, the longer the duration of the laser pulsed laser, the greater the energy deposition and the greater the risk of thermal effects. It is critical to reduce the deposition of energy and avoid heating of the ocular tissue, which can cause irreparable damage to the ocular tissue.

[0049] Observations that are part of the present invention are that all systems using femtosecond lasers for cataract surgery are based on a device for moving the beam that is configured such that it is possible to focus the beam at a very large distance from the lens. The section corresponds to ...

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Abstract

The present invention relates to an ophthalmic surgical apparatus which comprises a laser source (1) suitable for emitting a beam of laser pulses (8) with a duration of one picosecond to one nanosecond; an optical focussing system (10) for focussing said beam of laser pulses on a focal point (6); and a system for moving the beam of laser pulses, configured to move said focal point (6) along a predetermined path. According to the invention, the laser source (1) generates a beam of picosecond to nanosecond laser pulses (8), focussed next to a surface (25) of the anterior segment of the eye (4),the focal point (6) being located at a distance d other than zero from an optical axis (21) of symmetry of the anterior segment of the eye (4), the system (30) for moving the beam of laser pulses includes a single degree of freedom of rotation about an axis of rotation (36) so as to move said focal point (6) along a curved path (16) located in an annular area about the optical axis (21) of symmetry of the anterior segment of the eye (4); and the ophthalmic surgical apparatus is configured with a numerical aperture so as to limit the geometric optical aberrations at the focal point (6) and on the entire curved path (16) in said annular area about the optical axis (21) of symmetry of the anterior segment of the eye (4).

Description

technical field [0001] The present invention relates to ophthalmic surgical devices. More precisely, the present invention relates to surgical devices for the anterior segment of the eye. In particular, the present invention relates to surgical devices for the treatment of cataracts. Background technique [0002] Cataract is a primarily age-related eye disease that afflicts hundreds of thousands of people around the world every year. Cataracts produce progressive clouding of the lens. The lens is the optical medium of the eye, which is usually transparent and has the form of a lenticular lens between the cornea and the retina. The lens includes a capsule, also known as the lens capsule, and a core located in the center of the capsule. The capsule is connected to the muscle by ligaments, allowing the curvature of the lens to be modified. Thus, the lens allows accommodation, ie, the formation of an image on the retina according to the viewing distance. [0003] Surgical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F9/008
CPCA61F9/00825A61F2009/0087A61F2009/00887A61F2009/00897A61B18/20A61F9/0084A61F9/009A61B2018/2035
Inventor B·沙萨涅F·德卢瓦松D·图布尔F·萨林P·德朗德
Owner 阿尔法诺夫光学和激光技术中心
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