Astigmatism correction device for conea

Abstract

The invention relates to the field of medical treatment, and discloses an astigmatism correction device for conea. The astigmatism correction device comprises a supporting and fixing system, a positioning and guiding system and a conea vector loosing system, wherein the three systems are formed into an entirety, complement each other, and positions of the three systems are are relatively stabilized. Through an annular fixed base and a support frame, the whole device is accurately fixed to an eyeball; through a T-shaped controlling rod, a central pivot, a bidirectional pointer and a circumference dial scale, the steepest shaft of astigmatism is accurately positioned and the arc length required to be cut is measured, and meanwhile, with coordination of the conea vector loosing system, a conea lamellar fixed-depth cutter is accurately controlled to do vector motion, so that the tip of the cutter is accurately perpendicular to the cutting face of the conea and is cut into the conea; and then, manufacturing of an arc notch is finished through stably controlling a circumferential motion of the tip of the cutter, so that accuracy of the notch position, regularity of the notch and roundness of the shape are effectively ensured, and the stability and the accuracy of surgery are greatly improved.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a corneal astigmatism correction device. Background technique [0002] The development of social economy and science and technology has made great progress in today's society, and people's quality of life and average life expectancy have also improved significantly. Cataract patients have higher and higher requirements for postoperative visual quality and uncorrected vision. Long-lasting, comfortable, and mirror-free status is required. Postoperative residual astigmatism in cataract patients mainly depends on the existing preoperative corneal astigmatism and surgically induced astigmatism. At present, surgically induced astigmatism is basically well controlled, so preoperative corneal astigmatism has become a major cause of poor visual quality after refractive cataract surgery. One of the most important factors affecting the whole vision. Accurate correction of corneal astigmatis...

AI Technical Summary

Problems solved by technology

Before making the incision, it is necessary to mark the steep axis of astigmatism with the astigmatism positioning ring or the positioning and navigation system. The positioning ring is rough and difficult to guarantee accuracy. Although the positioning and navigation system can increase the accuracy, the equipment is expensive and the operation is complicated, so it is not easy to popularize; surgery In this case, the arc-shaped incision is made purely by hand like an arc drawn on paper, but the surgeon’s hand is suspended above the eye without any fixed support, and the cornea is hemispherical. The stability, accuracy, predictability, and repeatability of the incision for loosening are not good enough, and it is also difficult to cut the cornea perpendicular to the corneal section, and it is easy to cause irregular and uneven incisions, which will affect the correction effect, such as Overcorrection or undercorrection, even irregular astigmatism, may also cause complications such as increased corneal and conjunctival damage, obvious foreign body sensation after surgery, and delayed corneal healing after surgery

Moreover, most surgeons are right-handed. If the surgical incision is on the nasal side of the right eye or the temporal side of the left eye, the operation will be more difficult and unstable.

Therefore, the problem of poor surgical stability and accuracy caused by manual operation to limbal release is a key problem that needs to be solved urgently.

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