A simulation method of corneal postoperative situation

Abstract

The invention provides a method for simulating corneal postoperative conditions, the steps of which include the following steps: step 1, establishing a basic eyeball model through finite element modeling software; step 2, inputting specific object corneal parameters on the basis of the basic eyeball model to establish individual eyeballs Morphological model; step 3, input the individual corneal material properties, and prepare a personalized whole-eye eyeball model; step 4, prepare the ablation surgery marking model by inputting the cutting depth parameters and cutting range parameters in the surgical plan simulation software; step 5, in the ablation surgery On the basis of the marked model, construct an ablation surgery model without intraocular pressure; step 6, remove the corneal tissue according to the position and depth of the marked ablation contour on the ablation surgery model without intraocular pressure, and obtain the postoperative model; step 7, according to the optical path tracing The reference data of postoperative corneal refractive power is obtained through trace method calculation and simulation to evaluate the operation effect and realize the accurate prediction of corneal postoperative situation of the three operation schemes.

Description

technical field [0001] The invention relates to a simulation method, in particular to a simulation method of corneal postoperative situation Background technique [0002] After the continuous iteration of IK, EK, and PRK, there are three main types of refractive surgery: TPRK, LASIK, and SMILE. The full name of TPRK in Chinese is "transepithelial laser keratectomy. The principle of TPRK is to remove the corneal epithelium and the anterior corneal stromal layer, complete the change of corneal curvature, and make the external objects clearly image on the retina. Since only the superficial layer is operated, only the It is suitable for people with myopia within 700 degrees. Its advantages are no incision, no corneal flap, high degree of personalization, and good visual imaging effect. The operation is simple and completed in one step, and the instruments do not need to directly touch the eyeball during the operation, and the safety is quite High, there are no various corneal c...

AI Technical Summary

Problems solved by technology

[0005] Existing technical solution: Chinese patent "CN110960349A" discloses a method for predicting the diopter adjustment value of SMILE refractive surgery. This technical solution involves the establishment of a three-dimensional model of the eyeball, but this technical solution only uses the three-dimensional model to establish a database. The predicted value is obtained by comparing with the previous model. It has a single function and can only predict the diopter adjustment value during refractive surgery, and cannot simulate the visual effect after surgery.

And this invention is based on the principle of machine learning algorithm, which is different from the finite element analysis of the present invention, its prediction accuracy is not high, the degree of personalization is low, and it cannot be visualized

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