CN103926711A - Optical lens for controlling eye axis growth - Google Patents

Abstract

An optical lens for controlling the growth of the ocular axis is adapted to be placed in front of the eye of a patient to correct ametropia of the eye of the patient. The optical lens is provided with a central area with a focus on the fovea of the macula lutea and a peripheral area which extends outwards from the central area and enables the focus of incident light to be on or in front of the retina of the patient through aspheric zooming, and by adjusting and eliminating spherical aberration, the eye axis of the patient can be gradually controlled to adapt to the condition that the peripheral area is imaged on or in front of the retina, the growth of the eye axis can be slowed down, and therefore the ametropia of the patient is relieved.

Description

Optical lenses to control eye axial growth

technical field

The invention relates to an optical lens, in particular to an optical lens for controlling eye axis growth.

Background technique

Myopia means that when a person looks at a distance, the parallel light is refracted by the eyeball and converges in front of the retina, so a clear image cannot be formed on the retina. Nearsightedness can be corrected with concave lenses, and diopters are usually used to measure the condition of ametropia.

Myopia is usually caused by excessive reading and other near-distance activities that bring excessive accommodation to the eyes. When the normal human eye changes from seeing far to near, the image formed by the object in the eye will move backward. , so that it no longer falls on the retina, and the object seen is blurred. Therefore, in order to see objects clearly again, the eyes need to make adjustments, that is, contract the ciliary muscle to make the lens more convex, thereby forming stronger refraction, and allowing the image of the object to return to the retina. However, if the eyes are used at close range for a long time, the spasm of the ciliary muscle may also stimulate the elongation of the anterior and posterior axis of the eyeball, thus forming irreversible myopia. According to medical data research, every time the degree of myopia increases by 100 degrees (-1.00D), the axial length of the eye will increase by 0.37 mm, and the longer the axial length, the greater the pull on the retina behind the eyeball, which will gradually cause the retina to appear. Degeneration phenomenon, the larger retina may also detach, and in severe cases, it may cause retinal detachment.

Therefore, if the length of the eye axis can be adjusted and does not continue to grow, the degree of myopia of the patient will not increase. Therefore, controlling myopia patients can slow down the growth of the eye axis and slow down the progression of myopia after wearing glasses.

As shown in Figure 1, when the eye 4 of a myopia patient is not wearing a myopia lens, the distant scene is imaged in front of the retina 41, and Figure 2 is when the eye 4 of the myopia patient wears a myopia lens 5, the distant scene passes through the myopia The lens 5 is adjusted to form an image on the retina 41 . Wherein, the existing myopia lens 5 is a spherical concave lens, the distant scene is imaged on the retina 41 through the central area of the myopia lens 5 close to the optical axis, and the distant scene is imaged on the retina 41 through the peripheral area farther from the optical axis due to spherical aberration. The image is formed behind the retina 41, so the eye 4 will make adjustments to clearly image the distant scene on the retina 41, that is, contract the ciliary muscle 42 to make the lens 43 more convex, thereby forming stronger refraction. The imaging of distant objects can fall on the retina 41 through the peripheral area of the myopia lens 5 . But at this time, the imaging through the central area of the myopia lens 5 will move to the front of the retina 41 to form a blurred visual image. If the eyes 4 are in this adjustment state for a long time, the spasm of the ciliary muscle 42 may also stimulate the elongation of the eye axis, thereby causing the deepening of myopia.

Contents of the invention

The object of the present invention is to provide an optical lens for controlling eye axis growth.

The optical lens for controlling eye axis growth of the present invention comprises a central area and a peripheral area extending outward from the central area. The diopter of the peripheral zone is smaller than that of the central zone and gradually decreases toward the outside.

Preferably, the optical lens for controlling eye axis growth of the present invention includes a central area and a peripheral area extending outward from the central area. The central area has the same curvature and fixed focus, and the peripheral area is configured from negative spherical aberration to positive spherical aberration gradually.

The beneficial effect of the present invention is that: when a myopic patient wears the optical lens, the distant scene is imaged on the retina through the central area of the optical lens, and the distant scene is imaged on the retina through the peripheral area farther from the optical axis. The diopter is smaller than the diopter of the central area and is imaged on the retina or in front of it. Therefore, in order to clearly image the distant scene on the retina, the eye will make adjustments, that is, to relax the ciliary muscle and make the curvature of the lens larger, so that The imaging of the distant scene through the peripheral area of the optical lens can fall on the retina. The above eye adjustment methods can prevent the ciliary muscle from being in a tense and spasm state to stimulate the elongation of the eye axis, thereby causing the deepening of myopia.

Description of drawings

Fig. 1 is the schematic diagram illustrating the ametropia of eyes of a myopic patient;

Fig. 2 is the schematic diagram illustrating that the eyes of the myopia patient correct their ametropia via a myopia lens;

Fig. 3 is the front view of the first embodiment of the optical lens for controlling eye axis growth according to the present invention;

Fig. 4 is a schematic diagram illustrating the correction of the ametropia of the myopia patient's eyes through the first embodiment;

Fig. 5 is the front view of the second embodiment of the optical lens for controlling eye axis growth according to the present invention;

Fig. 6 is a schematic diagram illustrating that the eyes of the myopia patient correct their ametropia through the second embodiment;

Fig. 7 is the front view of the third embodiment of the optical lens for controlling eye axis growth according to the present invention;

Figure 8 is a sectional view of the third embodiment;

FIG. 9 is a schematic diagram illustrating the correction of the ametropia of the eye of the myopia patient through the third embodiment.

Detailed ways

The present invention is described in detail below in conjunction with accompanying drawing and three embodiments:

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 3 , the first embodiment of the optical lens for controlling the growth of the eye axis of the present invention includes a central area 1, a blind area 20 located at the periphery, and a center area 1 extending outward and between the central area and the blind area. 20 rooms in the surrounding area 2.

The two opposite sides of the central area 1 have a fixed curvature and a fixed focus.

The blind zone 20 is a non-visual zone.

The diopter of the peripheral zone 2 is smaller than the diopter of the central zone 1 and gradually decreases outwards. Preferably, the difference between the diopter of the peripheral zone 2 and the diopter of the central zone 1 starts outwards from the adjacent central zone 1. +0.25D increments to +3.00D.

Preferably, the spherical aberration formed by the two opposite sides of the peripheral area 2 gradually changes from negative spherical aberration to positive spherical aberration from adjacent to the central area 1 to the outside.

Referring to Fig. 4, when a myopia patient's eye 4 wears this optical lens and is looking at the distance, the distant scene is imaged on the fovea (fovea) of the retina through the central area 1 of the optical lens, and the distant scene is passed through the distance light. The peripheral area 2 with the far axis is imaged in front of the retina 41 because the diopter of the peripheral area 2 is smaller than the diopter of the central area 1, so the eye 4 will make a clear image of the distant scene on the retina 41. To adjust means to relax the ciliary muscle 42 to increase the curvature of the lens 43 to form a weaker refraction, so that the imaging of distant objects through the peripheral area 2 of the optical lens can fall on the retina 41 . The adjustment method of the eye 4 above can prevent the ciliary muscle 42 from being in a tight spasm state to stimulate the elongation of the eye axis, thereby causing the deepening of myopia.

Referring to Fig. 5, the second embodiment of the optical lens for controlling eye axis growth of the present invention is a contact lens (contact lens), comprising a central area 1, a blind area 20 and a center area 1 extending outwards and between The peripheral area 2 between the central area 1 and the blind area 20 . In this embodiment, the central area 1 is a circular area with a diameter of 3.0 mm and a center of vision of the optical lens as the origin. The two opposite sides of the central area 1 have a fixed curvature and a fixed focus.

The blind zone 20 is a non-visual zone.

The outer edge of the peripheral zone 2 is the periphery of a concentric circle with a diameter of 6.0 mm and the optical center of the optical lens as the origin. The diopter of the peripheral zone 2 is smaller than that of the central zone 1 and gradually decreases toward the outside. Preferably, the diopter of the central area 1 is -3.00D, and the diopter of the peripheral area 2 gradually decreases from -2.00D to +0.00D from the position adjacent to the central area 1 toward the outside. Preferably, the spherical aberration formed by the two opposite sides of the peripheral area 2 gradually changes from negative spherical aberration to positive spherical aberration from adjacent to the central area 1 to the outside.

Wherein, the optical lens is made of a copolymer (copolymer) formed by reacting 2-hydroxyethyl methacrylate (HydroxyEthylMethAcrylate, HEMA) and methacrylic acid (MethAcrylic Acid, MAA). The optical lens changes from a dry state to a wet state, and its radial swelling ratio is 1.28. The central thickness of the optical lens is 0.08mm. The water content of the optical lens in the wet state is 55%. The oxygen permeability of the optical lens at 35°C is 22*10-11 [cm3O2(STP)*cm]/(sec*cm2*mmHg).

Referring to Fig. 6, when a myopic patient's eye 4 wears the optical lens, the distant scene is imaged on the fovea of the retina 41 through the central area 1 of the optical lens, while the distant scene passes through the peripheral area farther away from the optical axis. 2 and because the diopter of the peripheral area 2 is smaller than the diopter of the central area 1 and the image is formed in front of the retina 41, so the eye 4 will make adjustments in order to clearly image the distant scene on the retina 41, that is, relax the ciliary The muscle 42 makes the curvature of the lens 43 larger, thereby forming a weaker refraction, so that the imaging of a distant scene through the peripheral area 2 of the optical lens can fall on the retina 41 . The adjustment method of the eye 4 above can prevent the ciliary muscle 42 from being in a tight spasm state to stimulate the elongation of the eye axis, thereby causing the deepening of myopia.

Referring to Fig. 7 and Fig. 8, the third embodiment of the optical lens for controlling the growth of the eye axis of the present invention is an optical lens for a frame of glasses and is made of polycarbonate resin (Polycarbonate, PC), and the refractive index of polycarbonate resin is 1.586, the optical lens includes a central area 1 , a blind area 20 and a peripheral area 2 extending outward from the central area 1 and between the central area 1 and the blind area 20 .

The central area 1 is an area that takes the visual center as the origin, and the diameter of the minor axis is 2.0 ± 1.0 cm and the diameter of the major axis is 2.5 ± 1.0 cm. In this embodiment, the diameter of the minor axis is 2.0 cm and the diameter of the major axis is 2.5 cm. .

The blind zone 20 is a non-visual zone.

The peripheral area 2 and the side of the blind area 20 away from the eyes are polymerized or attached to form an adhesive layer 3 made of polymethylmethacrylate (PolyMethylMethAcrylate, PMMA). The refractive index of polymethyl methacrylate is 1.49. The thickness of the adhesive layer 3 gradually increases from 1 μm to 300 μm from the position adjacent to the central area 1 to the position close to the edge of the optical lens. Preferably, the thickness of the adhesive layer 3 gradually increases from 5 μm to 200 μm from a place adjacent to the central area 1 to an area 0.5 cm away from the outer edge of the central area 1, and the adhesive layer is 0.5 cm away from the outer edge of the central area. The thickness of the area outside cm is 200 μm.

More preferably, the adhesion layer 3 is made of a composite material, and its refractive index becomes smaller the farther it is from the center of the central region 1 .

Referring to Fig. 9, when a myopic patient's eye 4 wears the optical lens, the distant scene is imaged on the fovea of the retina 41 through the central area 1 of the optical lens, because the peripheral area 2 is a composite material whose refractive index It is smaller than the refractive index of the central area, so that its diopter is smaller than the diopter of the central area, so the distant scene is imaged in front of the retina 41 through the peripheral area 2 of the optical lens, so the eye 4 clearly images the distant scene in the On the retina 41, an adjustment will be made, that is, to relax the ciliary muscle 42, so that the curvature of the lens 43 becomes larger, thereby forming a weaker refraction, so that the image of a distant scene through the peripheral area 2 of the optical lens can fall on the retina 41 . The above adjustment method of the eyes can prevent the ciliary muscle 42 from being in a tense and spasm state to stimulate the elongation of the eye axis, thereby causing the deepening of myopia.

To sum up the above, the optical lens for controlling the growth of the eye axis of the present invention has different diopters through the central area 1 and the peripheral area 2 of the optical lens, so that the distant scene is imaged on the macular fovea of the retina 41 through the central area 1 of the optical lens , and the distant scene is imaged in front of the retina 41 through the peripheral area 2 which is far from the optical axis and because the diopter of the peripheral area 2 is smaller than the diopter of the central area 1 . Therefore, in order for the eye 4 to clearly image the distant scene on the retina 41, it will make adjustments, that is, relax the ciliary muscle 42, make the curvature of the lens 43 larger, thereby forming a weaker refraction, and let the distant scene pass through the optical lens. The imaging of the peripheral area 2 can fall on the retina 41. The adjustment method of the eye 4 above can prevent the ciliary muscle 42 from being in a tight spasm state and stimulate the elongation of the eye axis, thereby causing the deepening of myopia, so it can really achieve the purpose of the present invention.

The above is only an explanation of the specific structural embodiments of the present invention. Without violating the structure and spirit of the present invention, all those skilled in the art can still make various changes and modifications. In order to be covered in the scope of the following patent applications in this case.

Claims (9)

1. an optical mirror slip of controlling axial growth, is characterized in that: comprise a center and a surrounding zone being extended outwardly by this center, the diopter of this surrounding zone is less than center and gradually successively decreases outwardly.

2. control the optical mirror slip of axial growth for one kind, be suitable for being worn on the patient's eye front side of an ametropia, it is characterized in that: this optical mirror slip comprises a center and a surrounding zone being extended outwardly by this center, this center has identical curvature and fixed-focus, and this surrounding zone fades to spherical aberration,positive configuration by against rule spherical aberration.

3. the optical mirror slip of control axial growth as claimed in claim 1 or 2, is characterized in that: this center for the optic centre with this optical mirror slip for initial point and minor axis diameter for 2.0 ± 1.0 centimeters and major diameter be 2.5 ± 1.0 centimeters of regions that formed.

4. the optical mirror slip of control axial growth as claimed in claim 1 or 2, is characterized in that: this center for the optic centre with this optical mirror slip for initial point and diameter be border circular areas that 3mm to 6mm was formed.

5. the optical mirror slip of control axial growth as claimed in claim 1 or 2, is characterized in that: this surrounding zone is larger far from the radius in the center of circle, and its institute's diopter that compensates is larger, this compensation diopter from+0.25D to+3.00D.

6. the optical mirror slip of control axial growth as claimed in claim 1 or 2, is characterized in that: a side of this surrounding zone forms one deck adhesion layer, and the refractive index of this adhesion layer is less than 1 for the ratio of the refractive index of this optical mirror slip.

7. the optical mirror slip of control axial growth as claimed in claim 6, is characterized in that: this adhesion layer is formed with compound substance, and its refractive index is less away from more from this center, center.

8. the optical mirror slip of control axial growth as claimed in claim 6, is characterized in that: the thickness of this adhesion layer is by being close to this center place outward to being increased to gradually 300 μ m near being changed to by 1 μ m of this optical mirror slip edge.

9. the optical mirror slip of control axial growth as claimed in claim 8, it is characterized in that: the thickness of this adhesion layer is by being close to this center place outward to being increased to gradually 200 μ m away from being changed to by 5 μ m of this outer rim 0.5cm place, center, and this adhesion layer is 200 μ m away from the thickness in the region outside the outer rim 0.5cm of this center.