VisTor The new Toric IOL by Hanita Lenses - PowerPoint PPT Presentation

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VisTor The new Toric IOL by Hanita Lenses

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  1. VisTorThe new Toric IOL by Hanita Lenses Sept 2013

  2. Definition Astigmatism - The cornea has different radii (Dpt) in different meridians, causing the focus to spread between two points.

  3. Effect on vision The image may be clearly focused on the retina in the horizontal plane, but not in the vertical plane: Or vice-versa: Or at any other angle…

  4. Diagnosis: Regular astigmatism Topographer IOLMaster

  5. Diagnosis: Irregular Astigmatism Topographer IOLMaster

  6. Correction of astigmatism by IOL Astigmatic cornea can be represented as cylinder, causing vertical rays focus differently from horizontal ones, leading to dispersion of focus and blurry image quality. This can be corrected by placing additional cylinder of the same power, rotated by 900. This is the principle of action of the toric IOL. The IOL corrects the dispersion induced by the cornea, focusing the rays in one point on the retina and restoring the sharp image quality.

  7. Correction of astigmatism by IOL Astigmatic cornea can be represented as cylinder, causing vertical rays focus differently from horizontal ones, leading to dispersion of focus and blurry image quality. This can be corrected by placing additional cylinder of the same power, rotated by 900. This is the principle of action of the toric IOL. The IOL corrects the dispersion induced by the cornea, focusing the rays in one point on the retina and restoring the sharp image quality.

  8. VisTor Platform Excellent stability in the capsular bag endurance to rotation, tilt & decentration. Visible axis marking even for small pupils Injection through 1.8 mm incision 3600 enhanced square edge decrease PCO

  9. Aspheric optics Anterior toric surface, posterior aspheric surface Designed using Arizona Uni. model, with statistical eye data of old population Standard corneal spherical aberration +0.27µ,corrected by natural lens IOL asphericity -0.14, leaving residual +0.13µ for better contrast sensitivity, shown in Prof. Tetz study Total correction of Toric aberrations

  10. Raw material Hydrophilic acrylic 25% water, produced by Benz R&D (USA) >10 years clinicalexperience and > 1 million implantations of Hanita’s IOLs Violet light blocker equivalent to natural chromophore. Better transmission of blue light than yellow IOLs – important for dim light situations High Abbe number, low Refractive index (1.46 @35o) means less chromatic aberrations & higher contrast sensitivity

  11. Toric Calculator order form, • on www.hanitalenses.com

  12. Toric Calculator, on • www.hanitalenses.com

  13. Clinical Study + Post marketing evaluation

  14. Clinical Study preliminary results (Sept 2013) Results Preliminary study for : rotational stability & Refractionaccuracy

  15. Clinical Study preliminary results (Sept 2013) 70% of patients obtained Cylinder under 0.5D post op

  16. Clinical Study preliminary results (Sept 2013)

  17. Clinical Study preliminary results (Sept 2013) • * • *Patient with refraction of: Sph=0, Cyl=0

  18. Clinical Study preliminary results (Sept 2013) • * Significant rotation (>15º) has occurred in 2 eyes with high AL (>26mm). Both cases are not included above due to short follow-up time (<1M). Due to this, for improved stability in long eyes, IOLs below 16 dpt are provided with external diameter of 11.5mm

  19. Preliminary conclusions • (Sept 2013) - The Hanita VisTor is a MICS lens with toric optics - It can be implanted through 1.8 mm incisions, with no impairment of existing corneal astigmatism - It can be easily positioned, by clockwise and counterclockwise rotation - For improved stability in long eyes, IOLs below 16 dpt are provided with external diameter of 11.5mm - Precise refraction and correction of astigmatism

  20. Thank you