1 / 18

The new Akreos MI 60 lens

The new Akreos MI 60 lens. Joel Pynson, MD - Director Design Engineering Bausch & Lomb, Toulouse - France London, September 9th 2006. Akreos material. Hydrophilic acrylic Made of MMA and HEMA Hydration rate : 26% First human implantation : July 1998 Excellent biocompatibility

axel-mclaughlin
Download Presentation

The new Akreos MI 60 lens

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. The new Akreos MI 60 lens Joel Pynson, MD - Director Design Engineering Bausch & Lomb, Toulouse - France London, September 9th 2006

  2. Akreos material • Hydrophilic acrylic • Made of MMA and HEMA • Hydration rate : 26% • First human implantation : July 1998 • Excellent biocompatibility • Superior optic quality (machining versus molding) • Over 1.5 millions lenses implanted

  3. Akreos AO • To improve the PCO rate with a full 360° barrier • To improve the visual results with an aspheric optic • To reduce the incision size from 3.2 mm to 2.8 mm

  4. Spherical Aberration Typical Spherical IOL S.A. < 0 “Undercorrected” Proposed Aspherical IOL S.A. = 0 Proposed Aspherical IOL S.A. > 0 “Overcorrected”

  5. Advantages • Better optic quality whatever is the pupil diameter • Optic quality not modified by lens decentration • Suitable for any cornea, even cornea with negative spherical aberration

  6. Next generation : Akreos MI 60 • Goals : develop a sub 2mm (MICS) IOL without jeopardising the stability of the implant inside the capsular bag. • Design new haptics that are both slender and ensure excellent stability of the implant. • Check the behaviour of the implant experimentally, by using a computer-generated finite element model • Check the behaviour of the implant experimentally, by using the Miyake technique

  7. Akreos MI60 haptic design • 4 haptics angled at about 10° • A rigid part near the 360° barrier and forming, together with the lens, a rigid central area • A thinner, external flexible part • A curved terminal part.

  8. Akreos MI60 – ANSYS model

  9. Akreos MI60 – Carrara model

  10. Miyake Test

  11. Pilot Clinical Study on Akreos Micro-incision Lens • Single centre, one surgeon, 20 patients • Primary outcome: corneal incision size • Secondary outcomes: • Visual quality: UCVA, BCVA (Logmar chart), • Intracapsular stability: centration vs pupil, anterior-posterior displacement, PCO • Follow up: 12 months

  12. Injection technique 1: “cartridge in” • Standard injection technique, 10 patients • Mean incision size: • 2.11mm before implantation (min 2, max 2.3) • 2.22 mm after implantation • Stretch : 0,11 mm • Minimal incision size • Min 2.2 mm

  13. 1.25 mm Injection technique 2:“cartridge out” • Wound-assisted technique, 10 patients • ICD = incision diameter, no extra pressure during lens injection => Isobaric injection • Mean incision size • 1,77 mm before injection (min 1,7, max 1,9 ) • 1,86 mm after injection • Stretch : 0,09 mm • Minimal incision size • Min 1,8 mm • Isobaric injection achieved with the Medicel Viscoglide 1.8 system Short learning curve

  14. Stability of refraction over time logMAR Visual Acuity • Gain of 6 lines of UCVA (left side) • Good predictability of refractive outcome • Good early post-op BCVA, • Stability of VA at 1 year

  15. Lens Stability versus Pupil Left to right: patient 10 at 15 days, 1 month, 3 month , 6 month and 1 year • At 1, 3, 6 month and 1 year, minimal movements were observed. • Y1 : 0.11mm (SD=0.088) • Lens very stable in bag.

  16. Posterior Capsule Opacification (n=18) • Retro-illumination pictures were analysed with EPCO 2000 software analysis of 6mm and 3mm central area • EPCO scores at 1-Year in line with what we are used to see with standard lenses.

  17. Conclusions • Akreos Micro-incision Lens has demonstrated to be safe and effective after 1-Year follow up • It allows insertion through a 1.8mm incision • Isobaric injection reduces incision trauma • Innovative design provides excellent intracapsular stability at 1 year • Visual acuity is excellent and stable • At 1 year , PCO rates are very low

More Related