1 / 31

MYOPIA, ASTIGMATISM, HYPEROPIA…

MYOPIA, ASTIGMATISM, HYPEROPIA…. PERSONALIZED TREATMENT Bernard Mathys, MD Secretary-general of the Belgian Society of Cataract & Refractive Surgery. Refractive surgery in 2004. Today we use mostly PRK (surface treatment) and Lasik to perform surgery and our desire is to improve our results.

nituna
Download Presentation

MYOPIA, ASTIGMATISM, HYPEROPIA…

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MYOPIA, ASTIGMATISM, HYPEROPIA… PERSONALIZED TREATMENT Bernard Mathys, MD Secretary-general of the Belgian Society of Cataract & Refractive Surgery

  2. Refractive surgery in 2004 Today we use mostly PRK (surface treatment) and Lasik to perform surgery and our desire is to improve our results How can we do this? Better instruments, new lasers, well-trained surgeons, improvement of post-op treatments… and new algorithms?

  3. Algorithm factor • Improve the treatment itself: -3 of X is not necessarily -3 of Y • Personalize treatment =>Improve quality of vision • Possibility to help people with thin corneas, large pupils, high ametropia Different steps are needed:

  4. Carefull preop examination

  5. Technologically advanced Laser

  6. Zyoptix: the name of the system The laser custom treatment

  7. Lasik The intervention - making the flap

  8. Lasik Closing the flap

  9. HOW DOES «PERSONALIZED TREATMENT»WORK ?

  10. The idea

  11. The idea

  12. Wavefront analyse Reconstruction of wavefront by CCD-image> Zernike coefficient CCD-Image

  13. Lenslet CCD Wave Aberration Array Array Spot Array Hartmann-Shack WavefrontMeasurement Perfect Eye Aberrated Eye

  14. Wave Aberration of a Surface

  15. The shape of the wavefront is depicted in Zernike coefficient, each shape describes a deformation

  16. Conventional Refraction radial order 2nd Zernike Modes defocus astigmatism astigmatism Higher Order Aberrations 3rd coma coma trefoil trefoil 4th quadrafoil astigmatism astigmatism spherical quadrafoil secondary secondary 5th coma pentafoil trefoil coma secondary pentafoil secondary secondary secondary trefoil

  17. Point Spread Function (PSF) Point Spread Function: is the representation of an optical system of a punctual and distant light source ( star in the sky) Airy Disc

  18. Point Spread Function vs. Pupil SizePerfect Eye

  19. Point Spread Function vs. Pupil SizeTypical Eye

  20. Perfect eye (diffraction limited) MRB GYY MAK Each eye has different patternsof High Order Aberrations. Wave Aberration 5.7 mm pupil Pointspread Function Retinal Image

  21. Encouraging results

  22. Encouraging resultsPreop –6.5 D Zyoptix

  23. Postop Plano 6M VA 13/10

  24. Zyoptix System – Clinical Outcomes

  25. Night vision

  26. Haloes

  27. Custom treatment

  28. NEW SCALE ? • VA is a less sensitive measure of the correction of high-order aberrations • Increase the quality of the retinal image • We need to assess quality of vision in true-life conditions: Contrast & low-contrast sensitivity Different lightning conditions Color vision Glare & haloes

  29. Custom treatment: the future ? • Aberrometry • Topography • Linked to the laser, to achieve personal treatment • Must improve our actual results in all cases • Must be safe • Not a higher complication rate

  30. 20/20/20/20

  31. THANK YOU FOR YOUR ATTENTION • Bernard Mathys, MD • Secretary-general of the Belgian Society of Cataract & Refractive Surgery

More Related