Artificial lens, manufacturing method for artificial lens and method for treating cataract by using artificial lens
A technology of intraocular lens and lens, applied in the direction of intraocular lens, eye implant, ophthalmic surgery, etc., can solve the problem of inaccurate corneal curvature, etc., achieve the effect of reducing the possibility, calculating accurately, and accurately calculating the effective lens position
Inactive Publication Date: 2014-03-12
郑泽钧
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is that among people who have received refractive surgery such as laser vision correction, the existing calculation method is not accurate in calculating the corneal curvature
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[0047] first refer to Figure 1a , which is a simplified cross-sectional view of the human eye 20 . Cornea 30 is the outermost portion of eye 20 . Outside the cornea 30 is air 28 and between the cornea 30 and the lens 26 is aqueous humor 32 . Light enters from the outside, is refracted by the cornea 30 and the lens 26, and finally focuses on the retina 31.
[0048] Now refer to Figure 1b , which shows an eye before and after corneal refractive surgery such as LASIK. Cornea 30 has corneal anterior surface 22 and corneal posterior surface 24 . Before refractive surgery, both the anterior corneal surface 22 and the posterior corneal surface are approximately spherical. The middle portion of the anterior corneal surface 22 is cut away or ground flat during surgery, thereby flattening the new corneal anterior surface 34 after surgery.
[0049] figure 2 A flowchart of a method of manufacturing an intraocular lens is shown. The method includes obtaining the corneal diopter (...
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The invention provides a method for manufacturing an artificial lens. The method comprises the following steps of: measuring the front surface curvature of the cornea of an eye in a first analysis range, and measuring the back surface curvature of the cornea in a second analysis range, wherein the first analysis range and the second analysis range have a same center point; measuring the thickness of the cornea at the center point; calculating the diopter of the cornea through an equation; measuring an axis oculi; calculating an effective lens position from the back surface curvature of the cornea; calculating the dioper of the artificial lens according to the dioper of the cornea, the axis oculi and the effective lens position; and manufacturing the artificial lens according to the dioper of the artificial lens. The invention also provides the artificial lens manufactured by the method. The invention also provides a method for treating cataract by using the artificial lens.
Description
technical field [0001] The invention relates to an artificial lens and a manufacturing method thereof, in particular to an artificial lens manufactured according to the curvature of the front surface of the cornea and the rear surface of the cornea and a manufacturing method thereof. Background technique [0002] Before performing cataract surgery on a patient, the doctor must first calculate the curvature and placement of the intraocular lens. Among them, the curvature of the intraocular lens is calculated by the curvature of the patient's cornea. Traditional methods just use an estimated number to calculate the curvature of the cornea. However, this estimate becomes inaccurate among people who have undergone refractive surgery such as LASIK. Contents of the invention [0003] The technical problem to be solved by the present invention is that among people who have received refractive surgery such as laser vision correction, the existing calculation method is not accura...
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IPC IPC(8): A61F2/16A61F9/007
Inventor 郑泽钧
Owner 郑泽钧