CN206353223U - A kind of glasses customized for glasses wearer - Google Patents
A kind of glasses customized for glasses wearer Download PDFInfo
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- CN206353223U CN206353223U CN201621234932.3U CN201621234932U CN206353223U CN 206353223 U CN206353223 U CN 206353223U CN 201621234932 U CN201621234932 U CN 201621234932U CN 206353223 U CN206353223 U CN 206353223U
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Abstract
The utility model discloses a kind of glasses customized for glasses wearer.In two refractive surfaces of the eyeglass of the glasses, at least one surface is asymmetric curved-surface structure, and remaining is non-spherical structure；Glasses face diopter after glasses wearer puts at central visionIt is consistent with mirror prescription, in the visual line of sight of 30 degree of visual angle of glasses wearer's eye, squint diopterDeviate percentageNo more than 0.125, squint astigmatismNo more than 0.125.The glasses provided by technical solutions of the utility model, due to consideration that when human eye pupil position and wearing spectacles eyeglass inclination, and the refracting power of human eye different sight direction eyeglass, eyeglass uses asymmetric curved-surface structure, deviation and the strabismus astigmatism of eyeglass strabismus diopter can be effectively reduced, the accuracy that different sight direction is corrected defects of vision is improved, is made after glasses wearer puts on one's glasses, with the good visual field and comfort.
Description
Technical field
The utility model is related to a kind of personalized glasses, and more particularly to one kind considers human eye pupil position and eyeglass inclines
Oblique factor carries out lens design, processes obtained glasses.
Background technology
In the art it is well known that glasses are used for the correction of the defects of vision.The defects of vision of eyeglass wearer pass through
The vision prescription that oculist or optist provide is described, the diopter of lenses fitted, astigmatism needed for vision prescription is provided
The parameters such as degree, astigmatism direction, lens materials refractive index.The producer of eyeglass then designs according to vision prescription, manufactured, and finally uses
Mean power and astigmatism on lens tester testing lens in industry defined point zonule.
In fact, sight is moved with the position of thing when human eye is depending on thing, eyeglass wearer eyeball rotates, and passes through mirror
The different zones of piece are watched.Because eyeglass has certain thickness, the curvature of former and later two refractive surfaces is different, sight warp
The lenslet of the zonule crossed equivalent to one, these lenslets are each variant, and the state of dioptric imaging also belongs to different axle
Foreign object is imaged.So, the actual diopter (refracting power of eyeglass) experienced of human eye occurs with the region that sight passed through
Change, and it is different with the change in sagitta of arc both direction in meridian.That is the mean power of monocline apparent time (is not squinted
Luminosity) with facing when diopter (paraxial luminosity) change, but also produce additional astigmatism (strabismus astigmatism).
Path that human eye sight is passed through in eyeglass, eyeglass different zones are equivalent to the dioptric imaging of lenslet, and it is reflected
State and the surface configuration of eyeglass, thickness, the inclined degree vertically and horizontally of eyeglass and the oculopupillary position of people are close
Cut is closed, so that the actual diopter experienced of human eye is also closely related with these factors.These factors are strong by glasses wearer
Eyeglass lens power, the face shape of glasses wearer needed for the positive defects of vision, selected spectacle frame shape are determined.
Obviously, in order to obtain optimal visuality, it is necessary to pay close attention to the refracting power under lenses fitted state, eyeglass is set
Meter and detection will be carried out according to the demands of individuals of each glasses wearer.But the lens tester of currently available technology, including vertometer,
Class Plus surface type measurement instrument hartman test, Ronchi grating method of testing of Rotlex companies etc., all do not account for human eye
The rotation of eyeball, is not also detected eyeglass and human eye pupil combination.In the design aspect of eyeglass, Chinese invention patent
(CN 103123420B) disclose it is a kind of using using eyeglass-eye pupil as an optical system method, to obtain eyeglass
Ball photometric distribution and astigmatism distribution, this method are directed to two-sided free form surface, calculate the eyeglass front and rear surfaces of sight process
On position and corresponding curvature.Even if Chinese invention patent CN102422201 discloses a kind of be embedded into big preceding visual angle
Mirror holder can also obtain the good visual field eyeglass shape data generation method, the invention is mainly focused on reduction mirror
The left and right of piece prismatic action is unbalanced.Above-mentioned two patent not yet points out each zonule during people's anorthopia as the axle of lenslet
Outer imaging features and the design method adaptable with it.Chinese invention patent CN 102419482B are disclosed one kind and set with optics
Software ZEMAX is counted as the double-sized non-spherical nearsighted eyeglass of Platform Designing, it is contemplated that the strabismus astigmatism of eyeglass is used as optimization bar
One of part, but be not involved with glasses wearer and put on one's glasses the tilt condition of rear lens.Publication No. CN 1511270 middle promulgated by the State Council
Bright patent disclosure one kind considers oculomotor method for designing spectacle lenses, also without the inclination for being related to eyeglass.
The content of the invention
There is provided a kind of eye with the good visual field and comfort for defect of the utility model present in prior art
Mirror, makes glasses wearer avoid the occurrence of the phenomenon of big Power Error and astigmatism under strabismus state.
Realize that the technical scheme of the utility model purpose is to provide a kind of glasses customized for glasses wearer, including eyeglass and mirror
Frame.In two refractive surfaces of the eyeglass, at least one surface is asymmetric curved-surface structure, and remaining is non-spherical structure；Institute
Glasses are stated after glasses wearer puts on, diopter D is faced at central vision0It is consistent with mirror prescription, at glasses wearer's eye visual angle 30
Spend in visual line of sight, squint diopter DrDeviate percentage | (Dr-D0)/D0| it is not more than 0.125, strabismus astigmatism CrNo more than
0.125|D0|；Described strabismus diopter DrFor the meridian that is determined by meridian and sagittal image point position and sagitta of arc direction diopter
Average value；Described strabismus astigmatism CrFor the meridian and the difference of the diopter in sagitta of arc direction determined by meridian and sagittal image point position
Absolute value.
Compared with prior art, the glasses provided by technical solutions of the utility model, its eyeglass uses asymmetric curved surface knot
Structure, vision prescription is in addition to including the conventional optometry parameter such as dioptric optical value, Refractive Index of Material, in addition to glasses wearer puts on selected eye
The vertically and horizontally inclination angle of the made glasses rear lens of mirror holder, and glasses wearer sight and eyeglass when looking squarely intersection point to pupil
Distance, therefore, the glasses provided can make glasses wearer effectively reduce the deviation of strabismus diopter under strabismus state and squint picture
Dissipate, the accuracy that different sight direction is corrected defects of vision is improved, with the good visual field and comfort.
Brief description of the drawings
Fig. 1 is that light enters the oculopupillary side schematic view of people by eyeglass；
Fig. 2 is the schematic diagram that eyeglass horizontal tilt is shown after glasses wearer puts on one's glasses；
Fig. 3 is for the evaluation model that is provided by the utility model to eyeglass without carrying out refracting power evaluation under inclination conditions
An example, the diopter of display meridian and sagitta of arc both direction is with human eye visual angle change curve map；
Fig. 4 carries out refracting power in the case of vertical tilt to eyeglass for the evaluation model that is provided by the utility model and commented
The diopter of one example of valency, display meridian and sagitta of arc both direction is with human eye visual angle change curve map；
Fig. 5 is a kind of design flow diagram for asymmetric curved surface eye lens that the utility model embodiment is provided；
Fig. 6 be the utility model embodiment 2 provide by evaluation model to initial lens in the case of nonangular
As human eye visual angle changes strabismus diopter and strabismus astigmatism in refracting power evaluation result, display vertical and horizontal both direction
Change；
Fig. 7 is being inclined by evaluation model to the eyeglass by aspheric design in nothing for the offer of the utility model embodiment 2
As human eye visual angle changes strabismus diopter in refracting power evaluation result in the case of tiltedly, display vertical and horizontal both direction
With the change of strabismus astigmatism；
Fig. 8 is being tilted by evaluation model to the eyeglass by aspheric design for the offer of the utility model embodiment 2
In the case of refracting power evaluation result, display vertical and horizontal both direction on human eye visual angle change strabismus diopter and
Squint the change of astigmatism；
Fig. 9 is for the offer of the utility model embodiment 2 by evaluation model to passing through aspherical and Compensation Design eyeglass
Bent in refracting power evaluation result under inclination conditions, display vertical and horizontal both direction as human eye visual angle changes strabismus
The change of luminosity and strabismus astigmatism；
Figure 10 be the utility model embodiment 3 provide by evaluation model to initial lens in the case of nonangular
As human eye visual angle changes strabismus diopter and strabismus astigmatism in refracting power evaluation result, display vertical and horizontal both direction
Change；
Figure 11 is being inclined by evaluation model to the eyeglass by aspheric design in nothing for the offer of the utility model embodiment 3
As human eye visual angle changes strabismus diopter in refracting power evaluation result in the case of tiltedly, display vertical and horizontal both direction
With the change of strabismus astigmatism；
Figure 12 is being tilted by evaluation model to the eyeglass by aspheric design for the offer of the utility model embodiment 3
In the case of refracting power evaluation result, display vertical and horizontal both direction on human eye visual angle change strabismus diopter and
Squint the change of astigmatism；
Figure 13 is for the offer of the utility model embodiment 3 by evaluation model to passing through aspherical and Compensation Design eyeglass
Bent in refracting power evaluation result under inclination conditions, display vertical and horizontal both direction as human eye visual angle changes strabismus
The change of luminosity and strabismus astigmatism.
Embodiment
Technical solutions of the utility model are further described with reference to the accompanying drawings and examples.
Embodiment 1：
Pupil position, lens tilt angle and eyeglass rise data to be evaluated that the present embodiment is provided according to vision prescription, build
One kind is found to squint diopter DrWith strabismus astigmatism CrFor the evaluation model of evaluation result, during for being squinted by eyeglass human eye
The actual refracting power of eyeglass is evaluated.
Referring to accompanying drawing 1, it is that light enters the oculopupillary side schematic view of people by eyeglass；Illustrated in Figure 1 is edge
It is embedded in the vertical outside inclination angle Γ of eyeglass on spectacle framev, human eye visual angle Φr, it is oculopupillary that a certain view directions enter people
Incidence angle Α of the path of chief ray (corresponding to sight) and process in lens front surface1, outgoing on lens posterior surface
Angle Β2。
It is the schematic diagram that eyeglass horizontal tilt is shown after glasses wearer puts on one's glasses referring to accompanying drawing 2；Γ in figureLAnd ΓRRespectively
For the horizontal tilt angle of left mirror and right mirror.To look squarely that sight is parallel with eyes and straight line Ρ by lens front surface center is sits
The Z axis of system is marked, passes through the x/y plane that the preceding centre of surface plane vertical with Z axis is coordinate system.The face shape arrow of eyeglass front and rear surfaces
The inclination angle that height is provided in coordinate system according to vision prescription is vertically and horizontally rotated by coordinate transform；By coordinate
Lens front surface rise after conversion, the lens posterior surface rise after coordinate transform plus lens thickness, according to optometry at
The eye pupil position that side is provided is configured to optical system to the eyeglass on glasses wearer's different sight direction as the starting point of sight
Refracting power is evaluated.
The present embodiment will allow for the face shape and selected mirror holder feature of glasses wearer, the pupil provided according to vision prescription
Position, lens tilt angle and eyeglass rise data to be evaluated, set up evaluation model, obtain evaluation result strabismus diopter DrWith it is oblique
Video dissipates Cr, for designing eyeglass；Described evaluation model is：Using the Differential Geometry method of curved surface, pass through ray tracing, meter
The position in the path that a certain view directions enter human eye pupil chief ray process, chief ray and eyeglass front and rear surfaces intersection point is calculated,
And correspond to the curvature of principal normal, incidence angle and refraction angle, meridian plane and the sagittal surface, meridian direction and sagitta of arc direction of point of intersection；
According to the outer light pencil image-forming principle of axle, the position of meridian image point and sagittal image point is respectively obtained, and then respectively obtain human eye sight
In the strabismus diopter D of the correspondence view directionsrWith strabismus astigmatism Cr；Described strabismus diopter DrFor by meridian and sagitta of arc picture
Meridian and the average value of sagitta of arc direction diopter that point position is determined；Described strabismus astigmatism CrFor by meridian and sagittal image point position
Put the absolute value of the difference of the meridian of determination and the diopter in sagitta of arc direction.
By the optical system that the evaluation model that the utility model is provided is constituted, its emergent pupil is the eye of aperture very little
Pupil, is the outer light pencil imaging of axle, the light beam of light pencil along the opposite direction of sight from thing to eye pupil according to the reversible law of light path
Axle is referred to as chief ray.By the Differential Geometry method of curved surface, by ray tracing, calculate and enter human eye pupil chief ray process
Path, the position of front and rear surfaces on eyeglass, and eyeglass front and rear surfaces correspondence position principal normal, incidence angle and refraction angle,
The curvature of meridian plane and sagittal surface, meridian direction and sagitta of arc direction.In the incidence angle Α of lens front surface1；Refraction angle Β1, in mirror
The incidence angle Α on surface after piece2；Refraction angle Β2.Meridian image point position such as formula (1) is calculated using light pencil imaging formula outside axle
It is shown：
Sagittal image point position is calculated by formula (2)：
In formula (1) and (2), Α is incidence angle of the chief ray on plane of refraction；Β is refraction angle；NAFor incident Fang Jie
The refractive index of matter；NBFor the refractive index of refraction side's medium；TAFor distance of the incident chief ray from thing to refraction point on meridian plane；TB
For distance of the refraction chief ray from refraction point to meridian image point；SABe on sagittal surface incident chief ray from thing to refraction point away from
From；SBFor distance of the refraction chief ray from refraction point to sagittal image point；RTFor the curvature half of plane of refraction meridian direction at refraction point
Footpath；RsFor the radius of curvature in plane of refraction sagitta of arc direction at refraction point.Formula (1) and (2) are in preceding surface, the refraction of two, rear surface
Applied successively on face.By meridian image point position and sagittal image point position of the infinity thing after reflecting twice, you can calculate appearance
Meridian direction and the refracting power diopter in sagitta of arc direction on some zonule of piece.Meridian and sagitta of arc direction refracting power diopter
Average value for strabismus diopter, along radial direction r somewheres strabismus diopter be Dr.Meridian and sagitta of arc direction refracting power dioptric
The difference of degree is strabismus astigmatism, is C along the strabismus astigmatism in radial direction r somewheresr。
As shown in Figure 3 and Figure 4, eyeglass to be evaluated is that front and rear surfaces are sphere to the evaluation result obtained by evaluation model
, diopter be 4 hyperopic lens.Fig. 3 is the diopter that lens tilt angle is meridian and sagitta of arc both direction in the case of 0
With human eye visual angle change curve map, it is the diopter in sagitta of arc direction and the 4 of vision prescription requirement at 35 degree to be shown in human eye visual angle
Diopter is more or less the same, but the diopter of meridian direction has differed as many as 1 degree with 4 diopters of design requirement, squints diopter
0.55 diopter is differed, and there are the astigmatism of 1 diopter.
In fact, glasses wearer puts on one's glasses, rear lens has inclination, and Fig. 4 is outward-dipping 8 degree of eyeglass vertical direction, dioptric
Degree is with the longitudinal visual angle change curve map of human eye.It is apparent that in the case of being not 0 (eyeglass has inclination) at lens tilt angle, strabismus
The diopter that diopter and strabismus astigmatism generate sagitta of arc direction at asymmetric situation up and down, 35 degree of upward angle of visibility is 4.1 dioptrics
Degree, but meridian direction diopter up to 5.8 diopters, strabismus diopter has differed 0.95 dioptric with 4 diopters of design requirement
Degree, and there are the strabismus astigmatism of 1.7 diopters.
Thus illustrate, for the design of single-focus spectacles, it is considered to which actual impression luminosity and astigmatism during people's anorthopia are
It is necessary.Further, it is considered to which glasses wearer's inclined personalized designs of rear lens that put on one's glasses are also necessary.
There is provided a kind of design method of eyeglass for evaluation model of the present embodiment based on above-mentioned foundation.
Referring to accompanying drawing 5, it is a kind of design flow diagram for asymmetric curved surface eye lens that the present embodiment is provided；Specific step
It is rapid as follows：
1st, the dioptric optical value and Refractive Index of Material provided according to vision prescription, selectes suitable lens front surface and rear surface
Spheric curvature and lens center thickness.Using front and rear surfaces all for sphere as initial lens, using above-mentioned assessment models to first
Beginning eyeglass carries out refracting power evaluation in the case of nonangular, obtains as human eye visual angle changes strabismus diopter and strabismus picture
Scattered change.
2nd, according to the strabismus diopter and strabismus astigmatism evaluated to initial lens, the aspherical circular cone coefficient of optimization and height
Secondary term coefficient, carries out aspheric design.The rise of non-spherical surface is determined by the functional relation of equation below (3)：
Wherein, r is the radical length of eyeglass；C is non-spherical surface curvature of centre；K is aspherical circular cone coefficient；a2m m
=2,3....6 is aspherical high order term coefficient.To reach that diopter is squinted at the sight of 35 degree of human eye visual angle deviates percentage
|(Dr-D0)/D0| it is not more than 0.125, strabismus astigmatism CrNo more than 0.125 | D0| it is desired value, optimizes aspherical circular cone coefficient
With high order term coefficient, aspherical lens are obtained.This aspheric design can be the one side aspheric design on preceding surface or rear surface,
It can also be designed for the double-sized non-spherical of front and rear surfaces.
3rd, further, the inclination angle that the aspherical lens designed are provided according to prescription is commented again by evaluation model
Valency.It is consistent with prescription with the diopter at central vision according to evaluation result, and in the visual line of sight of 30 degree of human eye visual angle, tiltedly
Deviate percentage depending on diopter | (Dr-D0)/D0| it is not more than 0.125, strabismus astigmatism CrNo more than 0.125 | D0| it is desired value, it is right
The rise data of described aspherical lens compensate design, obtain a kind of rise data of asymmetric curve lens.It is non-right
The rise data of curve lens are called the rise data for the aspherical lens that step 2 is obtained plus being obtained by Compensation Design method
Compensate rise data.
The method of Compensation Design includes the diopter compensation at asymmetry compensation and central vision, is compensated rise number
According to.
Asymmetry compensation value includes horizontal and vertical cubic term value, shown in the rise offset such as formula (4) of cubic term：
Zc(x, y)=bx(x±xd)3+by(y+yd)3 (4)
Wherein, bxFor horizontal cubic term coefficient, xdFor transverse shifting millimeter, according to the difference of left and right mirror take respectively just,
Negative sign is moved to temporo side.byFor longitudinal cubic term coefficient, ydTo vertically move millimeter.
The diopter compensation of central vision is realized by finely tuning the curvature of centre of lens front surface or rear surface.
By the rise data of the aspherical lens obtained by step 2 plus compensation rise data, asymmetric curved mirror is obtained
The rise data of piece.According to the rise data mart modeling eyeglass of obtained asymmetric curve lens, obtain a kind of for glasses wearer's customization
Eye lens.
Embodiment 2
In the present embodiment, vision prescription provides following parameter：The 3 right eyeglasses of diopter long sight, refractive index 1.597.Ophthalmic lens wear
Person puts on 7 degree of the vertical tilt angle of selected spectacle frame rear lens, 5 degree of horizontal tilt angle, sight and eyeglass when glasses wearer looks squarely
Intersection point to pupil distance be 25 millimeters.The diopter and Refractive Index of Material provided according to vision prescription, selectes front and rear surfaces
All initial lens, the diopter of lens posterior surface 1,597 millimeters of radius of curvature, 2.5 millimeters of lens center thickness are used as sphere.It is right
Should preceding 149.5 millimeters of surface curvature radius.
Referring to accompanying drawing 5, the flow provided by embodiment 1 carries out the design of eyeglass.
The dioptric optical value and Refractive Index of Material first provided according to vision prescription, selectes suitable lens front surface and rear surface
Spheric curvature and lens center thickness.Using front and rear surfaces all it is sphere as initial lens, the assessment provided using embodiment 1
Model carries out refracting power evaluation to initial lens in the case of nonangular, obtains as human eye visual angle changes strabismus diopter
With the change of strabismus astigmatism.
In the present embodiment, initial lens are reflected in the case of without (inclination angle is 0) is tilted by evaluation model
Merit rating, obtains strabismus diopter and squints astigmatism as the change at human eye visual angle is as shown in Figure 6；Longitudinal direction is shown in figure and horizontal
As human eye visual angle changes the change of strabismus diopter and strabismus astigmatism on to both direction.
3 diopters of prescription requirements are gradually deviated from the increase strabismus diopter at human eye visual angle, it is oblique at 35 degree of visual angle
3.46 diopters are increased to depending on diopter, the diopter of deviation value 0.46 deviates percentage (Dr-D0)/D0=0.153, squint astigmatism
0.78 diopter, Cr/D0=0.260.
The aspheric design on preceding surface is carried out again.The rise of non-spherical surface is determined by formula (3)：
Non-spherical surface curvature of centre C=0.006690mm-1.Optimization aspherical circular cone coefficient K=-6.04, it is aspherical
High order term coefficient a4=-1.5 × 10-7, a6=-4.1 × 10-11。a8=5.2 × 10-14 a10=-8.9 × 10-18.By evaluating
Model to the aspherical lens without tilt (inclination angle is 0) in the case of carry out refracting power evaluation, obtain strabismus diopter and
Astigmatism is squinted as the change at human eye visual angle is as shown in Figure 7.Strabismus diopter is 3.08 diopters, deviation value at 35 degree of visual angle
0.08 diopter, deviates percentage (Dr-D0)/D0=0.027, squint the diopter of astigmatism 0.36, Cr/D0=0.120.Squint dioptric
Degree deviates and strabismus astigmatism is substantially reduced, both less than the 0.125 of 3 diopters times.
Further, to the aspherical lens of design, the vertical tilt angle provided according to prescription is 7 degree, horizontal tilt angle is 5
Degree, is revalued, 7 degree of eyeglass upper section slants outward by evaluation model, and eyeglass right inward tilts 5 degree (right eyeglass)；Its
Refracting power evaluation result is as shown in Figure 8.As the actual refracting power of the change in human eye sight direction occurs after lens tilt
Diopter at great changes, center of lens sight deviate from 3 diopters of prescription requirements, be 3.056 diopters.Up and down,
The strabismus diopter of left and right directions deviates substantially asymmetric, is at 3.36 diopters, downward 30 degree of visual angles at upward 30 degree of visual angles
It is for 2.97 diopters for 2.90 diopters, at 30 degree of visual angles of nasal side at 3.30 diopters, 30 degree of temporo side visual angle.Up and down, left and right
The strabismus astigmatism in direction is also substantially asymmetric, is to be bent at 0.69 diopter, downward 30 degree of visual angles for 0.09 at upward 30 degree of visual angles
It is for 0.20 diopter at luminosity, 30 degree of visual angles of nasal side at 0.62 diopter, 30 degree of temporo side visual angle.Evaluation result shows, although
Strabismus diopter of the aspherical lens of design under without heeling condition deviates and strabismus astigmatism all meets the requirements, but glasses wearer wears
After the upper glasses equipped with aspherical lens, the actual refracting power in strabismus has greatly changed, and strabismus diopter is maximum
0.36 diopter can be deviateed, maximum strabismus astigmatism will can not feel well up to 0.69 diopter, glasses wearer when squinting.
The evaluation result provided according to the present embodiment, the rise data to lens front surface carry out asymmetry compensation and center
Diopter compensation at sight.Asymmetry compensation includes the cubic term value of vertical and horizontal, and the rise offset of cubic term is as follows：
Zc(x, y)=bx(x±xd)3+by(y+yd)3,
Wherein, horizontal cubic term coefficient bxFor 3.2 × 10-6；Transverse shifting xdFor 6.5 millimeters, right mirror uses negative sign；Longitudinal direction
Cubic term coefficient byFor 4.8 × 10-6, vertically move ydFor 3.0 millimeters.
The curvature of centre for finely tuning lens front surface is 0.006713mm-1To realize that the diopter of central vision is compensated.
In the present embodiment, the rise data on the preceding surface of aspherical lens add bending by asymmetry compensation and center
After the compensation rise data that luminosity Compensation Design is obtained, the rise data of an asymmetric curve lens are obtained.The asymmetric song
The refracting power revalued that face eyeglass carries out lens tilt by evaluation model is as shown in Figure 9.Bending at center of lens sight
Luminosity meets 3 diopters of prescription requirements.Up and down, the strabismus diopter of left and right directions deviates and is obviously improved, upward 30 degree of visual angles
Locate as 3.11 diopters, be for 3.11 diopters, 30 degree of temporo side at downward 30 degree of visual angles at 2.98 diopters, 30 degree visual angles of nasal side
It is 3.00 diopters at visual angle.Up and down, the strabismus astigmatism of left and right directions is obviously reduced, and is 0.348 dioptric at upward 30 degree of visual angles
It is 0.354 diopter at degree, downward 30 degree of visual angles, is 0.374 diopter at 30 degree of visual angles of nasal side, 30 degree of temporo side is at visual angle
0.326 diopter.
The evaluation result of evaluation model shown, glasses wearer is put on equipped with the eyeglass after aspherical plus Compensation Design, regarding
In the visual line of sight that 30 degree of angle, strabismus diopter, which deviates, is 0.12 diopter (between 22 degree of -28 degree of upward angle of visibility) to the maximum,
Strabismus astigmatism is 0.374 to the maximum, and all no more than 0.125 | D0|=0.375 diopter.Glasses wearer can be made in strabismus without uncomfortable
Sensation.
The eyeglass provided by the present embodiment technical scheme is made after glasses, and the strabismus diopter that can effectively reduce glasses wearer is inclined
From with strabismus astigmatism.
Embodiment 3
In the present embodiment, vision prescription provides following parameter：The 6 left eyeglasses of diopter long sight, refractive index 1.597.Ophthalmic lens wear
Person puts on 8 degree of the vertical tilt angle of selected spectacle frame rear lens, 6 degree of horizontal tilt angle, sight and eyeglass when glasses wearer looks squarely
Intersection point to pupil 25 millimeters of distance.
The evaluation model and lens design flow provided by embodiment 1, is comprised the following steps that：
1st, the diopter and Refractive Index of Material first provided according to vision prescription, selected front and rear surfaces are all sphere as initial
Eyeglass, the diopter of lens front surface 1,597 millimeters of radius of curvature, 1.2 millimeters of lens center thickness.Surface curvature radius after correspondence
85.2 millimeters.Refracting power evaluation is carried out to initial lens in the case of nonangular by evaluation model, obtains squinting dioptric
Spend and strabismus astigmatism is as the change at human eye visual angle is as shown in Figure 10.It is gradually deviated from the increase strabismus diopter at human eye visual angle
- 6 diopters of prescription requirements, strabismus diopter increases to -6.88 diopters at 35 degree of visual angle, the diopter of deviation value 0.88,
Deviate percentage (Dr-D0)/D0=0.147, squint the diopter of astigmatism 1.23, Cr/|D0|=0.205.
2nd, the aspheric design on surface after carrying out.The rise of non-spherical surface is determined by formula (3).Non-spherical surface center
Curvature C=0.01177mm-1.Optimization aspherical circular cone coefficient K=-3.44, aspherical high order term coefficient a4=1.2 × 10-9,
a6=6.7 × 10-12。a8=8.9 × 10-14 a10=9.2 × 10-18, a12=-5.4 × 10-22.By evaluation model to this aspheric
Face eyeglass carries out refracting power evaluation in the case of nonangular, obtains strabismus diopter and squints astigmatism with human eye visual angle
Change is as shown in figure 11.Strabismus diopter is -6.03 diopters at 35 degree of visual angle, and the diopter of deviation value 0.03 deviates percentage
Than (Dr-D0)/D0=0.005, squint the diopter of astigmatism 0.30, Cr/|D0|=0.05, strabismus diopter deviates and squints astigmatism all
Very little.
3rd, the aspherical lens obtained to design, 8 degree of the vertical tilt angle provided according to prescription, 6 degree of horizontal tilt angle lead to
Cross evaluation model to be revalued, 8 degree of eyeglass upper section slants outward, slope inwardly 6 degree (left eyeglass) on the left of eyeglass.Refracting power
Evaluation result such as Figure 12.After lens tilt, the diopter at center of lens sight deviate from -6 diopters of prescription requirements,
For -6.15 diopters.Up and down, the strabismus diopter of left and right directions changes, and is -6.54 diopters at upward 30 degree of visual angles,
It is for -5.87 at -6.46 diopters, 30 degree of temporo side visual angle at -5.77 diopters, 30 degree of visual angles of nasal side to be at downward 30 degree of visual angles
Diopter.Up and down, the strabismus astigmatism of left and right directions is substantially asymmetric, is 1.0 diopters at upward 30 degree of visual angles, downward 30 degree regard
It is for 0.18 diopter at 0.91 diopter, 30 degree of temporo side visual angle at 0.048 diopter, 30 degree of visual angles of nasal side to be at angle.Evaluate
As a result show, although strabismus diopter of the aspherical lens of design under without heeling condition deviates and strabismus astigmatism is all conformed to
Ask, but glasses wearer is put on after the glasses equipped with aspherical lens, and the actual refracting power in strabismus has greatly changed, tiltedly
0.54 diopter can be deviateed depending on diopter maximum, strabismus astigmatism reaches 1.0 diopters.Particularly with near-sighted glasses glasses wearer, Xiang Yuan
The open visual field is needed when place is seen, the deviation of strabismus diopter and big strabismus astigmatism can make glasses wearer have blurring of vision and head
The uncomfortable sensation such as dizzy.
According to evaluation result, the rise data to lens front surface carry out the diopter compensation at asymmetry compensation and center.
Asymmetry compensation realizes that the rise offset of cubic term is by the cubic term value of vertical and horizontal：
Zc(x, y)=bx(x±xd)3+by(y+yd)3,
Wherein, horizontal cubic term coefficient bxFor -4.2 × 10-6；Transverse shifting xdFor 7.6 millimeters, left mirror uses positive sign；It is vertical
To cubic term coefficient byFor 6.9 × 10-6, vertically move ydFor 5.2 millimeters.
The curvature of centre for finely tuning lens front surface is 0.01173mm-1To realize that the diopter of central vision is compensated.
Rise of the rise data on the preceding surface of the aspherical lens obtained in design plus the cubic term of asymmetry compensation
After diopter compensation at offset and central vision, a kind of rise data of asymmetric curve lens are obtained, by evaluating mould
The refracting power that type is carried out under lens tilt state evaluates as shown in figure 13.Diopter at center of lens sight meets prescription will
- 6 diopters asked.Up and down, asymmetric being obviously improved of the strabismus diopter deviation of left and right directions, be at upward 30 degree of visual angles-
It is -5.80 diopters at 6.21 diopters, downward 30 degree of visual angles, is -6.21 diopters at 30 degree of visual angles of nasal side, 30 degree of temporo side is regarded
It is -5.84 diopters at angle.Up and down, the strabismus astigmatism of left and right directions is obviously reduced, and is 0.590 dioptric at upward 30 degree of visual angles
It is 0.338 diopter at degree, downward 30 degree of visual angles, is 0.693 diopter at 30 degree of visual angles of nasal side, 30 degree of temporo side is at visual angle
0.375 diopter.
Evaluation model evaluation result shows that glasses wearer puts on the mirror of the asymmetric curved-surface structure provided equipped with the present embodiment
Piece, in the visual line of sight at 30 degree of visual angle, strabismus diopter, which deviates, is 0.23 diopter (at 27 degree of upward angle of visibility) to the maximum, tiltedly
Video, which dissipates, is 0.693 to the maximum, and all no more than 0.125 | D0|=0.75 diopter.Level of comfort when glasses wearer squints changes significantly
It is kind.
Claims (1)
1. a kind of glasses customized for glasses wearer, including eyeglass and mirror holder, it is characterised in that：Two refractive surfaces of the eyeglass
In, at least one surface is asymmetric curved-surface structure, and remaining is non-spherical structure；The glasses are after glasses wearer puts on, center
Diopter is faced at sightIt is consistent with mirror prescription, in the visual line of sight of 30 degree of visual angle of glasses wearer's eye, squint diopter
Deviate percentageNo more than 0.125, squint astigmatismNo more than 0.125；Described strabismus diopterFor the meridian and the average value of sagitta of arc direction diopter determined by meridian and sagittal image point position；Described strabismus astigmatism
For the meridian and the absolute value of the difference of the diopter in sagitta of arc direction determined by meridian and sagittal image point position.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526890A (en) * | 2016-12-19 | 2017-03-22 | 苏州苏大明世光学股份有限公司 | Progressive multi-focal lens customized for glasses wearer and preparation method of progressive multi-focal lens |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526890A (en) * | 2016-12-19 | 2017-03-22 | 苏州苏大明世光学股份有限公司 | Progressive multi-focal lens customized for glasses wearer and preparation method of progressive multi-focal lens |
| CN106526890B (en) * | 2016-12-19 | 2019-06-14 | 苏州苏大明世光学股份有限公司 | A kind of progressive multi-focus lens and preparation method thereof for glasses wearer's customization |
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