Astigmatism axial position marker and marking method

Abstract

The invention discloses an astigmatism axial position marker and a marking method, and the astigmatism axial position marker comprises a dial which is provided with annular scales; an eyeball profiling part is located above the dial, the outer surface of the eyeball profiling part comprises an eyeball imitating surface, the bottom edge of the eyeball imitating surface is located on a first plane,and a straight line which passes through the vertex of the eyeball imitating surface and is perpendicular to the first plane is a first straight line; a gap is formed between the bottom of the eyeballprofiling part and the dial; the astigmatism axial position marker also comprises a supporting rod, wherein the top end of the supporting rod is fixedly connected with the eyeball profiling part, andthe bottom end of the supporting rod is fixedly connected with the dial; the marking part is attached to the outer surface of the eyeball profiling part and can be torn down; and a pointer, wherein the first end of the pointer is rotationally connected with the supporting rod, and the second end of the pointer points to the scales. The structural design of the astigmatism axial position marker can effectively reduce errors generated by astigmatism axial position positioning during an 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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