RU2000112954A - METHOD FOR DETERMINING ENERGY PARAMETERS FOR EXEMERLASER PHOTOREFRACTION CERATECTOMIC OPERATION FOR MYOPIA CORRECTION - Google Patents
METHOD FOR DETERMINING ENERGY PARAMETERS FOR EXEMERLASER PHOTOREFRACTION CERATECTOMIC OPERATION FOR MYOPIA CORRECTIONInfo
- Publication number
- RU2000112954A RU2000112954A RU2000112954/14A RU2000112954A RU2000112954A RU 2000112954 A RU2000112954 A RU 2000112954A RU 2000112954/14 A RU2000112954/14 A RU 2000112954/14A RU 2000112954 A RU2000112954 A RU 2000112954A RU 2000112954 A RU2000112954 A RU 2000112954A
- Authority
- RU
- Russia
- Prior art keywords
- cornea
- value
- refractive power
- energy
- myopia
- Prior art date
Links
- 208000001491 Myopia Diseases 0.000 title claims 5
- 230000004379 myopia Effects 0.000 title claims 5
- 210000004087 Cornea Anatomy 0.000 claims 8
- 210000003128 Head Anatomy 0.000 claims 1
- 230000003247 decreasing Effects 0.000 claims 1
Claims (1)
где σ - оптимальная величина показателя Гауссова распределения энергии в пучке лазерного излучения.Method for determining energy parameters for excimer laser photorefractive keratectomy operations for myopia correction, which consists in selecting the Gaussian distribution of energy in a laser beam depending on the value of the calculated corrected myopia, the energy density in the beam, and keratometric indicators of the patient’s cornea, including determining the magnitude of the refractive force of the cornea ma its main meridians, characterized in that with an increase in the magnitude of the refractive power of the cornea along its two heads nym meridians reduce component Gaussian energy distribution in a beam of laser radiation, respectively with decreasing the refractive power of the cornea by its two main meridians increased rate Gaussian energy distribution in the laser beam, which change according to the law:
where σ is the optimal value of the Gaussian distribution of energy in the laser beam.
230 мДж/см2 - А = 2,43;
240 мДж/см2 - А = 2,47;
250 мДж/см2 - А = 2,51.And - the coefficient of energy density in the beam. For the energy density in the beam
230 mJ / cm 2 - A = 2.43;
240 mJ / cm 2 - A = 2.47;
250 mJ / cm 2 - A = 2.51.
М - величина расчетной корригируемой миопии;
Kmax - максимальная величина преломляющей силы роговицы по двум ее главным меридианам;
Кmin - минимальная величина преломляющей силы роговицы по двум ее главным меридианам;
D = 43 - среднестатистическая величина преломляющей силы роговицы по двум ее главным меридианам;
С = 0,01 - коэффициент изменения σ - в зависимости от разницы средней величины преломляющей силы роговицы по двум ее главным меридианам и среднестатистической ее величины.B = 0.02 is the coefficient of change (depending on the value of the calculated myopia corrected;
M - the value of the calculated correctable myopia;
K max - the maximum value of the refractive power of the cornea along its two main meridians;
K min is the minimum value of the refractive power of the cornea along its two main meridians;
D = 43 is the average value of the refractive power of the cornea along its two main meridians;
C = 0.01 - the coefficient of change σ - depending on the difference in the average value of the refractive power of the cornea in its two main meridians and its average statistical value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2000112954/14A RU2197200C2 (en) | 2000-05-26 | 2000-05-26 | Method for detecting energetic parameters for operation of an exymerlaser photorefraction keratectomy at correction of myopia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2000112954/14A RU2197200C2 (en) | 2000-05-26 | 2000-05-26 | Method for detecting energetic parameters for operation of an exymerlaser photorefraction keratectomy at correction of myopia |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RU2000112954A true RU2000112954A (en) | 2002-07-10 |
| RU2197200C2 RU2197200C2 (en) | 2003-01-27 |
Family
ID=20235035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RU2000112954/14A RU2197200C2 (en) | 2000-05-26 | 2000-05-26 | Method for detecting energetic parameters for operation of an exymerlaser photorefraction keratectomy at correction of myopia |
Country Status (1)
| Country | Link |
|---|---|
| RU (1) | RU2197200C2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2479294C1 (en) * | 2012-02-13 | 2013-04-20 | Общество с ограниченной ответственностью "Ост-Оптик К" | Method for providing improved corneal organ-sparing in excimer laser correction of vision |
| RU2726995C9 (en) * | 2019-04-19 | 2020-08-28 | ОБЩЕСТВО С ОГРАНИЧЕННОЙ ОТВЕТСТВЕННОСТЬЮ "ОПТОСИСТЕМЫ" (ООО "Оптосистемы") | Method for laser correction of myopia |
-
2000
- 2000-05-26 RU RU2000112954/14A patent/RU2197200C2/en not_active IP Right Cessation
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