Method for manufacturing individualized ocular prosthesis based on 3D printing technology and corneal topography

Abstract

Based on 3D printing technology and corneal topography assisted personalized ocular prosthesis manufacturing method, through the high polymer impression material to make the patient's eye side conjunctival sac impression, and obtain the three-dimensional data of the conjunctival sac impression of the affected eye, and establish a three-dimensional model, remove the front surface of the three-dimensional model with the pupil center as the center, and the corneal diameter data of the healthy eye as the diameter of the circular area, and integrate the pupil diameter and corneal anterior surface curvature data of the healthy eye in this area, and finally obtain the three-dimensional model of the ocular prosthesis, and the ocular prosthesis is made through 3D printing technology, because the data of the pupil diameter and corneal anterior surface curvature of the healthy eye are integrated on the front surface of the three-dimensional model of the affected eye, the ocular prosthesis is more realistic and more suitable for the affected eye.

Description

Technical Field

[0001] This invention relates to the field of prosthetic eye manufacturing technology, specifically to a method for manufacturing personalized prosthetic eyes based on 3D printing technology and corneal topography. Background Technology

[0002] A prosthetic eye is a component of an artificial prosthesis used in ophthalmology to replace the eyeball. Most commercially available prosthetic eyes are made by molding the sclera using a mold to place a replica pupil and red line, then shaping it through heat pressing. This allows for mass production, resulting in standardized shapes and sizes. However, everyone's body characteristics are different. Therefore, prosthetic eyes manufactured using this traditional method will differ significantly from one person's other eye. The anterior surface data of the prosthetic eye on the affected side may be inaccurate, leading to reduced aesthetics and a less natural appearance after installation. Summary of the Invention

[0003] To address the technical deficiencies of existing technologies, this invention provides a method for manufacturing personalized prosthetic eyes based on 3D printing technology and corneal topography.

[0004] The technical solution adopted in this invention is: a method for manufacturing personalized prosthetic eyes based on 3D printing technology and corneal topography, comprising the following steps:

[0005] (1) Making a conjunctival sac impression on the affected eye: Inject quick-drying polymer impression material into the affected eye. After quick-drying and shaping, mark the center of the pupil on the anterior surface of the conjunctival sac impression and remove it to obtain the conjunctival sac impression of the patient's affected eye.

[0006] (2) Use a 3D scanner to obtain three-dimensional data of the conjunctival sac imprint membrane on the affected eye side and establish a three-dimensional model;

[0007] (3) The corneal diameter, pupil diameter, and anterior corneal surface curvature data of the healthy eye were measured by corneal topography, and digital images of the anterior segment of the healthy eye were taken.

[0008] (4) Mark the pupil center on the three-dimensional model of the conjunctival sac imprint membrane on the affected eye side, and remove the circular area on the anterior surface of this three-dimensional model with the pupil center as the center and the corneal diameter data of the healthy eye as the diameter.

[0009] (5) The data of pupil diameter and corneal anterior surface curvature of the healthy eye are integrated into the circular area of ​​the three-dimensional model of the conjunctival sac imprint membrane on the affected eye side, and the model is formed by modeling with Creo software system to form a three-dimensional model framework of the prosthetic eye.

[0010] (6) Based on the three-dimensional model framework of the prosthetic eye, a multi-material jet 3D printer is used to print and manufacture a personalized prosthetic eye.

[0011] In step (2), the three-dimensional data of the conjunctival sac impression membrane on the affected eye side includes the curvature and thickness of the anterior and posterior surfaces.

[0012] The manufacturing method also includes attaching a digital image of the anterior segment of the healthy eye directly to the surface of a three-dimensional model of the prosthetic eye using computer-aided manufacturing technology (CAM) to form a colored three-dimensional model.

[0013] The beneficial effects of this invention are as follows: This invention provides a method for manufacturing a personalized prosthetic eye based on 3D printing technology and corneal topography. A conjunctival sac impression film is made on the affected side of the patient using a polymer impression material. Three-dimensional data of the conjunctival sac impression film on the affected side is obtained, and a three-dimensional model is established. A circular area centered on the pupil center and with the diameter of the healthy eye's cornea as the diameter is removed from the anterior surface of this three-dimensional model. Data on the pupil diameter and anterior corneal surface curvature of the healthy eye are integrated within this area, ultimately obtaining a three-dimensional model of the prosthetic eye. The prosthetic eye is then manufactured using 3D printing technology. Because the data on the pupil diameter and anterior corneal surface curvature of the healthy eye are integrated into the anterior surface of the three-dimensional model on the affected side, the prosthetic eye is more realistic and better fits the affected side. Detailed Implementation

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] A method for fabricating personalized prosthetic eyes based on 3D printing technology and corneal topography includes the following steps:

[0016] (1) Making a conjunctival sac impression on the affected eye: Inject quick-drying polymer impression material into the affected eye, and remove it after quick-drying and shaping to obtain a conjunctival sac impression on the affected eye. The quick-drying polymer impression material can be a commonly used polymer impression material in dentistry.

[0017] (2) Use a 3D scanner to obtain three-dimensional data (including the curvature and thickness of the anterior and posterior surfaces) of the conjunctival sac of the affected eye and establish a three-dimensional model;

[0018] (3) The corneal diameter, pupil diameter, and anterior corneal surface curvature data of the healthy eye were measured by Pentacam corneal topography, and digital images of the anterior segment of the healthy eye were taken.

[0019] (4) Mark the pupil center on the three-dimensional model of the conjunctival sac imprint membrane on the affected eye side, and remove the circular area on the anterior surface of this three-dimensional model with the pupil center as the center and the corneal diameter data of the healthy eye as the diameter.

[0020] (5) The data of pupil diameter and corneal anterior surface curvature of the healthy eye are integrated into the circular area of ​​the three-dimensional model of the conjunctival sac imprint membrane on the affected eye side, and a three-dimensional model framework of the prosthetic eye is formed through modeling.

[0021] (6) The digital image of the anterior segment of the healthy eye is directly attached to the surface of the three-dimensional model of the prosthetic eye using computer-aided manufacturing technology (CAM) to form a colored three-dimensional model;

[0022] (7) Based on the color three-dimensional model framework of the prosthetic eye, a multi-material jet 3D printer (Magics software system) is used to print and produce a personalized prosthetic eye.

[0023] This invention integrates data on the pupil diameter and corneal anterior surface curvature of the healthy eye into the anterior surface of the three-dimensional model of the affected eye, making the prosthetic eye more realistic and better suited to the affected eye.

[0024] Please note to all technical personnel: Although the present invention has been described according to the specific embodiments above, the inventive concept of the present invention is not limited to this invention. Any modifications that utilize the inventive concept will be included within the scope of protection of this patent.

[0025] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for fabricating personalized prosthetic eyes based on 3D printing technology and corneal topography, characterized in that... This includes the following steps: (1) Making a conjunctival sac impression of the affected eye: Inject quick-drying polymer impression material into the affected eye. After quick-drying and shaping, mark the center of the pupil on the anterior surface of the conjunctival sac impression, and remove the impression to obtain a conjunctival sac impression of the patient's affected eye. (2) Use a 3D scanner to obtain the three-dimensional data of the conjunctival sac impression of the affected eye. The three-dimensional data of the conjunctival sac impression of the affected eye includes the curvature and thickness of the anterior and posterior surfaces, and a three-dimensional model is established. (3) The corneal diameter, pupil diameter, and anterior corneal surface curvature data of the healthy eye were measured by corneal topography, and digital images of the anterior segment of the healthy eye were taken. (4) Mark the pupil center on the three-dimensional model of the conjunctival sac impression of the affected eye, and remove the circular area on the anterior surface of the three-dimensional model with the pupil center as the center and the diameter of the cornea of ​​the healthy eye as the diameter. (5) The data of pupil diameter and corneal anterior surface curvature of the healthy eye are integrated into the circular area removed from the three-dimensional model of the conjunctival sac impression of the affected eye. Through modeling, a three-dimensional model framework of the prosthetic eye is formed. The digital image of the anterior segment of the healthy eye is directly attached to the surface of the three-dimensional model of the prosthetic eye through computer-aided manufacturing technology (CAM) to form a colored three-dimensional model. (6) Based on the three-dimensional model framework of the prosthetic eye, a multi-material jet 3D printer is used to print and manufacture a personalized prosthetic eye.