6 results about "Keratorefractive surgery" patented technology

The invention discloses a cornea blood vessel nebula area automatic identification and cutting parameter optimization system in a refractive operation, and relates to the technical field of ophthalmic refractive operations. The system comprises an anterior segment image acquisition module, an image processing module, a central processing module, an image display module, a data storage module and a parameter optimization module which are connected in sequence, the anterior segment image acquisition module acquires an anterior segment image of a user; the image processing module is used for processing the acquired anterior segment image of the user; the central processing module compares a cutting area range designed by the refractive surgery with the processed image; the image display module displays a comparison result; the data storage module stores the comparison result; and the parameter optimization module optimizes and adjusts the cutting parameters of the refractive surgery according to the comparison result. According to the method, corneal vessel nebula can be automatically identified, the position and range of the vessel nebula are compared with the cutting range, and corneal refractive surgery cutting area and incision position parameters are optimized.

The application provides a center positioning system for femtosecond laser ophthalmic corneal refractive surgery, which comprises an iris recognition component, a central processing component and a real-time display component, the iris recognition component is used for converting a real-time image of a patient into a digital image; the central processing component is electrically connected with the iris recognition component, and the central processing component is used for converting the digital image into an iris simulation image with a size equal to that of a pre-recorded patient examination iris image; the real-time display component is electrically connected with the central processing component, is used for receiving the iris simulation image transmitted by the central processing component, and presents the iris information transmitted by the central processing component in real time. Meanwhile, a center positioning method is also provided, which takes the corneal vertex as the center, calculates the self-rotation angle of a treated eye of a patient by comparing the image angle difference between the iris simulation image and the pre-recorded real-time image, improves the positioning accuracy, significantly reduces the residual myopia and astigmatism, and improves the safety of the ophthalmic femtosecond laser surgery.

This invention discloses a method for preparing a sustained-release levofloxacin and fluorometholone lacrimal canaliculus plug, comprising: (1) dispersing levofloxacin, polyglycolic acid, chitosan, and polylysine in a first solvent to form a first dispersion, dispersing fluorometholone and alginate in a second solvent to form a second dispersion, and then mixing the first and second dispersions evenly; (2) performing a crosslinking reaction at 45-55℃ for 3-10 hours, cooling, and drying to obtain a mixture; (3) subjecting the mixture obtained in step (2) to plasma treatment at less than 6 Pa for 30 seconds to 5 minutes, and then solidifying it. The lacrimal canaliculus plug of this invention can reduce the frequency of antibiotic use or eliminate the need for antibiotic use, has good patient compliance, good comfort, good biocompatibility, short-term degradation, few side effects, good water-swelling properties, and is not easy to fall off, and has a triple effect of anti-inflammatory, anti-infective, and dry eye treatment after corneal refractive surgery.

The invention discloses a manufacturing method of a refractive operation surface type optical equivalent device and an optimal surface type obtaining method, and belongs to the field of visual imaging and corneal refraction correction. The manufacturing method comprises the following steps: obtaining preoperative corneal surface type parameters of a patient before a refractive operation and a plurality of preset postoperative corneal surface type parameters corresponding to the refractive operation; for each postoperative corneal surface type parameter, an incident plane is constructed based on each postoperative corneal surface type parameter, an emergent plane is constructed based on a preoperative corneal surface type parameter, a series of corneal contact lenses composed of the incident planes and the emergent planes are constructed, and optical equivalent devices corresponding to each postoperative corneal surface type parameter are constructed based on the corneal contact lenses. By means of the method, the patient can directly experience and evaluate the visual effects of different corneal surface types after the operation before the operation, then the optimal corneal surface type parameters after the operation are screened out, the patient can experience the corneal surface type most suitable for the patient before the operation, and the consistency of the corneal refraction operation prediction result and the subjective feeling of the patient is improved.

The invention discloses an intelligent corneal lens / corneal flap separating device for a corneal refraction operation, and belongs to the technical field of ophthalmologic operation instruments. The two-degree-of-freedom force sensing module is electrically connected with the embedded hardware module and used for collecting force signals in the separation process. The attitude sensing module is in communication connection with the embedded hardware module and is used for acquiring pitch angle and roll angle data of the instrument; the upper computer communicates with the embedded hardware module and is used for receiving and processing data; the dynamic compensation algorithm is integrated in the embedded hardware module and is used for eliminating errors caused by inclination of the instrument; the device can output force-angle data in real time and store the data in a structured format, quantitative basis is provided for surgical operation, and mechanical damage to cornea tissue can be avoided; objective data basis is provided for doctors through a high-precision sensor with the force measurement precision of + / -1mN and the angle measurement precision of + / -1 degree, the traditional operation mode of hand feeling dependence is thoroughly changed, and the operation process can be quantified and traced.

This invention discloses an intelligent recommendation and optimization method for refractive surgery types based on corneal biomechanics, relating to the fields of intelligent medical decision-making and ophthalmic refractive surgery planning. After collecting preoperative feature sets of patients, this invention outputs a range of potential surgical procedures through a preliminary screening model that integrates a rule engine and LightGBM. By dividing the historical feature sets of four surgical procedures—ICL, SMILE, LASIK, and SURFACE—a two-stage classification and prediction framework is constructed. First, it distinguishes between ICL and corneal refractive surgery, and then further subdivides the corneal refractive surgery types. During training, optimization models are employed using five-fold cross-validation and SMOTE to output recommended surgical procedures. An interpretability force graph is drawn based on SHAP values ​​to improve the accuracy and safety of surgical procedure recommendations. This invention is the first to systematically incorporate corneal biomechanical parameters into a refractive surgery prediction model, achieving intelligent recommendation within a unified framework for multiple surgical procedures. It provides a reliable auxiliary decision-making basis for refractive surgery planning and has broad application value.