The document discusses challenges in cataract surgery, specifically issues with manual capsulorrhexis and the alignment of toric intraocular lenses (IOLs). It proposes a solution using a laser-etched contact lens with circular and radial marks to guide the surgeon during the procedure. This cost-effective device aims to improve precision for surgeons without advanced imaging systems.

1. http://www.precisioniolguide.com/
Dr Laurie Sullivan FRANZCO
laurence.sullivan@gmail.com

2. What are the problems?
1. Capsulorrhexis performed manually is not as
circular nor as perfectly sized as that performed
with a femtosecond laser.
2. Performance of toric IOLs depends accurate
alignment.
3. Expensive automatic imaging systems show
variable reliability, and steal light from the
surgeon’s view. They also have an annoyance
factor.
4. Parallax?

3. Verion axis 67⁰ – ?head tilt
Inter-canthal line

4. Verion axis 75⁰ – ?head tilt

5. Verion axis 78⁰ – ?head tilt

6. What is my solution?
A laser-etched contact lens with circular and
radial marks is used to guide manual
capsulorrhexis and toric IOL alignment
during cataract surgery.

7. Circular marks at 5, 6 and 7mm, and radial
marks every 5°

8. Advantages
A simple cost-effective device for intraoperative
use that will allow surgeons without image
guidance systems to be more confident using
toric and multifocal intraocular lenses.

9. How is it used?
Intra operatively the contact lens is placed on
the corneal surface during cataract surgery and
the surgeon visualizes the guide lines.

10. Verion Capsulorrhexis guide

12. PrecisionIOLguide with Verion Capsulorrhexis
guide before capsulorrhexis

13. Verion Capsulorrhexis guide after
capsulorrhexis using PrecisionIOLguide

14. Verion axis 78⁰ – note 90⁰ is 10-15⁰ off
ink marks

15. Verion and Mendez gauge disagree by 15⁰

16. Video of IOL alignment

17. PrecisionIOLguide nearly aligned with ink marks
and 1st Purkinje image - note limbus ring from
Verion does not match the eye

18. Prototype testing has begun.
Please see:
https://www.youtube.com/watch?v=p_rIPhr_wL8