CN101069636A - Cornea cutting depth calculation based on personalized human eye model - Google Patents
Cornea cutting depth calculation based on personalized human eye model Download PDFInfo
- Publication number
- CN101069636A CN101069636A CN 200610013616 CN200610013616A CN101069636A CN 101069636 A CN101069636 A CN 101069636A CN 200610013616 CN200610013616 CN 200610013616 CN 200610013616 A CN200610013616 A CN 200610013616A CN 101069636 A CN101069636 A CN 101069636A
- Authority
- CN
- China
- Prior art keywords
- human eye
- cornea
- cutting depth
- human
- eye model
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Eye Examination Apparatus (AREA)
Abstract
The present invention uses personalized human eye model as basis and utilizes the calculation of cornea-cutting depth of personal human eye and correction of out-of-focus, astigmation and high-level aberration of human eye to raise visual function of human eye. Said invention includes the following steps: utilizing actually-measured wavefront aberration of human eye, corneal characteristic parameters and intra-ocular every portion axial spacing distance data to create the personalized human eye model; then optimizing corneal front surface structure in said personalized human eye model, correcting wavefront aberration of human eye and utilizing the calculation of modification quantity of corneal form so as to obtain the corea-cutting depth of personal human eye.
Description
Technical field
The invention belongs to the vision correcting technical field.
Background technology
Correct the ametropia of human eye carries out widely with the method for refractive surgery.Traditional Laser in Situ Keratomileusis (LASIK) has been tending towards ripe at aspects such as the myopia of correcting human eye, astigmatism, yet has complication such as postoperative dazzle, monocular diplopia.Its main cause is that traditional laser cornea cutting operation causes postoperative human eye senior aberration to increase easily.The cornea ablation operation of wave front aberration guiding not only can be corrected the myopia and astigmatism of human eye, and can reduce senior aberration, improves the visual quality of human eye, thereby is more and more paid close attention to by people.
At present, the calculating of the cornea ablation operation corneal cutting depth of wave front aberration guiding is to carry out with the method for OPD (optical pathdifference, the optical path difference from the retina to the measurement plane).
OPD=(n
c-n
0) d formula 1
Wherein, n
cThe refractive index of expression cornea, n
0The refractive index of expression air, d is the cutting depth of cornea tissue.
Different individual human eyes has different ophthalmic optical characteristics.The method of calculating cornea cutting depth with formula is not considered other characteristic parameter of the cornea shape of human eye and ophthalmic, not accurately to calculate cornea cutting depth according to the concrete feature of individual human eye, thereby compared error with ideal cutting depth, this error more be can not ignore for the bigger human eye of wave front aberration.
Summary of the invention
The purpose of this patent is that human eyes wave-front optical aberration, cornea characteristic parameter and the ophthalmic each several part axial spacing data with actual measurement are the fundamental construction lens structure, thereby further makes up personalized human-eye model.On this basis,, optimize the front surface shape of cornea, the wave front aberration of correcting human eye, the cutting depth of calculating cornea, the visual function of raising human eye by the optimizational function of Zemax software.
This invention has following function and advantage:
Function one, the wavefront aberration data of known actual human eye, cornea characteristic parameter and ophthalmic each several part axial spacing data, utilization optical design software Zemax makes up personalized human-eye model.
Function two based on personalized human-eye model, is optimized the front surface structure of cornea, not only corrects human eye out of focus and astigmatism, and corrects the senior aberration of human eye, improves the visual quality of human eye.
Cornea surface structure before and after the function three, calculation optimization obtains the cutting depth of the cornea of individual human eye along the difference of optical axis direction.
Concrete technical scheme
The technical scheme of this invention comprises following main aspect:
One is accurately measured the cornea front and rear surfaces shape of individual human eye by the medical cornea activity mapping instrument, carries out the shape match with the high order aspheric surface function and is placed in the eye model; Measure the axial width of each several parts such as human eye's anterior chamber, crystalline lens, vitreous body with medical A-mode ultrasonic wave technology, these thickness are imported in the eye model as optical interval; Lenticular surface configuration is optimized, makes the wave aberration of full eye equate with the actual wave aberration that personnel selection glances wavefront aberrometer measures.
Its two, optimize the structure of anterior surface of cornea, reduce the wave front aberration of human eye.
Its three, the anterior corneal surface structure after the optimization with optimize before the anterior corneal surface structure compare, calculate the difference of cornea along optical axis direction, obtain the cutting depth of individual eye cornea.
Its four, mobile anterior surface of cornea, the anterior surface of cornea cutting depth that solves behind the initial optimization is minus problem, carries out iteration optimization then, the defocusing amount that makes new generation is zero.
Description of drawings
Accompanying drawing 1 is the calculation flow chart that the present invention is based on the cornea cutting depth of personalized human-eye model.
Specify embodiments of the present invention below in conjunction with accompanying drawing.
Concrete embodiment
As shown in Figure 1, Hartmann-Shack Wavefront sensor [1] is used for measuring the wave front aberration of human eye, the aberration data of individual human eye is joined in the majorized function of optical design software Zemax, defines the actual aberration of human eye with this.
Corneal topographer Orbscan II[2] be used for measuring corneal curvature and cornea front and rear surfaces height value with respect to the reference sphere.Anterior corneal surface is converted into vertically difference in height along the difference in height of radius vector direction, simulates the non-spherical surface of cornea with the high order aspheric surface function.
A-mode ultrasonic calibrator [3] is used for measuring the each several part spacing of axis oculi, comprises cornea front and rear surfaces spacing, the camera oculi anterior degree of depth, lens thickness and Vitrea thickness.
The ophthalmic optical system comprises cornea, aqueous humor, crystalline lens and Vitrea medium refraction index [4] The data Gullstrand eye model numerical value.
The face type of crystalline lens [5] is set to Ze Nike rise face, optimizes lenticular front and rear surfaces, makes the wave aberration of full eye equate with the actual wave aberration that personnel selection glances wavefront aberrometer measures.Personalized human-eye model [6] made up and finished this moment.
Optimize anterior surface of cornea, the human-eye model after being optimized [7].On the basis of initial optimization, personalized human-eye model is carried out iteration optimization, obtain the human-eye model [8] after the iteration optimization, this eye model can be corrected the out of focus [9] of human eye, astigmatism [10], senior aberration [11], and the cutting depth [12] that calculates cornea.
Claims (3)
1. the computational methods based on the cornea cutting depth of personalized human-eye model comprise cornea, crystalline lens and amphiblestroid structure.It is characterized in that: the wave front aberration by personalized human-eye model full aberration that gets and the actual human eye that measures with wavefront analyzer equates.
2. require the computational methods of described cornea cutting depth based on personalized human-eye model according to right 1, it is characterized in that: be optimized by Zemax software corneal front surface structure, not only can correct the out of focus and the astigmatism of human eye, and the senior aberration that can correct human eye.
3. require the computational methods of described cornea cutting depth based on personalized human-eye model according to right 1, it is characterized in that: before and after optimizing, anterior surface of cornea is the cutting depth of cornea along the difference of optical axis direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610013616 CN101069636A (en) | 2006-05-09 | 2006-05-09 | Cornea cutting depth calculation based on personalized human eye model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610013616 CN101069636A (en) | 2006-05-09 | 2006-05-09 | Cornea cutting depth calculation based on personalized human eye model |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101069636A true CN101069636A (en) | 2007-11-14 |
Family
ID=38897173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610013616 Pending CN101069636A (en) | 2006-05-09 | 2006-05-09 | Cornea cutting depth calculation based on personalized human eye model |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101069636A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102467612A (en) * | 2010-11-18 | 2012-05-23 | 沈阳理工大学 | Method for constructing individual eye optical model |
| CN104298815A (en) * | 2014-09-23 | 2015-01-21 | 南京邮电大学 | Reverse construction method for human eye average model |
| CN106291923A (en) * | 2016-10-25 | 2017-01-04 | 吉林大学 | A kind of projection helmet objective designing method of corrective ophthalmic optical aberration |
| CN114587775A (en) * | 2020-12-04 | 2022-06-07 | 艾维斯技术有限责任公司 | Customized ablation for correcting vision ametropia |
| CN114748242A (en) * | 2022-04-13 | 2022-07-15 | 南开大学 | Cornea ablation design method and device for wavefront-guided refractive surgery |
| CN115336967A (en) * | 2022-09-19 | 2022-11-15 | 南开大学 | Method for obtaining retinal morphology |
-
2006
- 2006-05-09 CN CN 200610013616 patent/CN101069636A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102467612A (en) * | 2010-11-18 | 2012-05-23 | 沈阳理工大学 | Method for constructing individual eye optical model |
| CN104298815A (en) * | 2014-09-23 | 2015-01-21 | 南京邮电大学 | Reverse construction method for human eye average model |
| CN106291923A (en) * | 2016-10-25 | 2017-01-04 | 吉林大学 | A kind of projection helmet objective designing method of corrective ophthalmic optical aberration |
| CN114587775A (en) * | 2020-12-04 | 2022-06-07 | 艾维斯技术有限责任公司 | Customized ablation for correcting vision ametropia |
| CN114748242A (en) * | 2022-04-13 | 2022-07-15 | 南开大学 | Cornea ablation design method and device for wavefront-guided refractive surgery |
| CN115336967A (en) * | 2022-09-19 | 2022-11-15 | 南开大学 | Method for obtaining retinal morphology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1951340A (en) | Artificial crystal design based on personalized human's eye model | |
| US6585375B2 (en) | Method for producing an artificial ocular lense | |
| US7887531B2 (en) | Excimer laser unit and relative control method for performing cornea ablation to reduce presbyopia | |
| AU2007223014B2 (en) | Method and apparatus for universal improvement of vision | |
| Oliveira et al. | Wavefront analysis and Zernike polynomial decomposition for evaluation of corneal optical quality | |
| CN102129132B (en) | Design method for cornea contact lens based on wave front technology | |
| EP1774899A1 (en) | Method of preventing the induction of aberrations in laser refractive surgery systems | |
| US11561413B2 (en) | Population of an eye model using measurement data in order to optimize spectacle lenses | |
| CN101140357A (en) | Cornea contact lens design based on personalized human-eye model | |
| JP2014128699A (en) | Small diameter inlay | |
| CN101957502A (en) | Design method of individualized cornea contact lens | |
| CN101069636A (en) | Cornea cutting depth calculation based on personalized human eye model | |
| KR20140119143A (en) | Improved intraocular lens and corresponding manufacturing method | |
| CN101617966A (en) | After-cornea refractive surgery artificial lens design | |
| CN102467612A (en) | Method for constructing individual eye optical model | |
| CN113171172B (en) | Method for simulating postoperative condition of cornea | |
| CN101229052A (en) | Amendment of wave aberration data in individual visualness-rectifying | |
| CN109828385A (en) | Personalized full-contact hard corneal contact lens production method | |
| Kohnen | Classification of excimer laser profiles | |
| Haddad et al. | Impact of a chromatic aberration-correcting intraocular lens on automated refraction | |
| CN101972135A (en) | Detection method of individual lenticular surface shape data | |
| Haigis | Intraocular lens calculation after refractive surgery | |
| CN101069637A (en) | Retina pleochroism space-image modulation degree detection based on personalized eye model | |
| CN101669850A (en) | MTF based optimization design for customized human eye correction model | |
| CA3046726C (en) | Calculation of actual astigmatism correction and nomographs for corneal laser treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |