Astigmatism axis marker and marking method

Abstract

The invention discloses an astigmatism axis marker and a marking method. The astigmatism axis marker comprises: a dial, the dial is provided with a ring scale; an eyeball profiling part located above the dial, the eyeball The outer surface of the profiling part includes an eyeball surface, the bottom edge of the eyeball surface is located on the first plane, and the straight line passing through the apex of the eyeball surface and perpendicular to the first plane is the first straight line, so There is a gap between the bottom of the eyeball profiling piece and the dial; a strut, the top of the pole is fixedly connected to the eyeball profiling piece and the bottom end is fixedly connected to the dial; A tear-off marking part on the outer surface of the eyeball profiling piece; a pointer, the first end of the pointer is connected to the support rod in rotation, and the second end of the pointer points to the scale. The structural design of the astigmatism axis marker can effectively reduce the error caused by locating the astigmatism axis during operation.

Description

technical field [0001] The invention relates to the technical field of medical instruments, and more specifically, to an astigmatism axis marker and a marking method. Background technique [0002] Cataract is the most blinding eye disease with the highest incidence worldwide. Phacoemulsification combined with intraocular lens implantation is the main means of treating cataract at present. The intraocular lens is an optical lens that replaces the opaque lens. The operation requires Phacoemulsification is used to remove the nucleus and cortex of the cloudy lens, retain the lens capsule, and then implant an intraocular lens in the lens capsule. Corneal astigmatism is one of the important factors leading to poor vision after cataract surgery, which can significantly affect the visual quality after cataract extraction. At present, the main methods for correcting astigmatism in cataract patients include wearing glasses after surgery, corneal excimer laser surgery, corneal limbus ...

AI Technical Summary

Problems solved by technology

This method has high requirements on the operator, poor repeatability, and prone to errors

In order to reduce the error, foreign manufacturers have produced markers with a bubble level, which are used to mark the level of the preoperative eye, but the sensitivity of the bubble level is poor, and the marking stability of the hand holding method is poor, and it is still easy to use during use. produce large error

In addition, since the diameter of the cornea is only about 10 mm, it is difficult to achieve accurate scale marking for the existing intraoperative astigmatism marking discs of this size and diameter. Generally, it can only be accurate to 5°, which also brings great errors to the operation.

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