VisTorThe new Toric IOL by Hanita Lenses

Sept 2013

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

Definition

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…

IOLMaster Topographer

Diagnosis: Regular astigmatism

IOLMaster Topographer

Diagnosis: Irregular Astigmatism

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.

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.

Correction of astigmatism by IOL

VisTor Platform

3600 enhanced square edge decrease PCO

Visible axis marking even for small pupils

Excellent stability in the capsular bag endurance to rotation, tilt & decentration .

Injection through 1.8 mm incision

Aspheric optics

Standard corneal spherical aberration +0.27µ, corrected by natural lens

Designed using Arizona Uni. model, with statistical eye data of old population

Anterior toric surface, posterior aspheric surface

IOL asphericity -0.14, leaving residual +0.13µ for better contrast sensitivity, shown in Prof. Tetz study

Total correction of Toric aberrations

Raw material

Violet light blocker equivalent to natural chromophore .

>10 years clinical experience and > 1 million implantations of Hanita’s IOLs

Hydrophilic acrylic 25% water, produced by Benz R&D (USA)

Better transmission of blue light than yellow IOLs – important for dim light situationsHigh Abbe number, low Refractive index (1.46 @35o) means less chromatic aberrations & higher contrast sensitivity

Toric Calculator order form,on www.hanitalenses.com

Toric Calculator, on www.hanitalenses.com

Germany, France, Israel, Colombia, Czech republic

9 Participating centers

180 Total no of eyes (planned)

Pre-op, surgery, 1 & 3 months

Follow-up visits

45 Implanted eyes

14 Eyes with follow-up >1M

Clinical Study + Post marketing evaluation

Clinical Study preliminary results (Sept 2013)

Results

Preliminary study for :rotational stability

&Refraction accuracy

Clinical Study preliminary results (Sept 2013)

PreOp PostOp0.00

0.50

1.00

1.50

2.00

2.50Cylinder Pre-Op vs. Post-Op

Refr

activ

e cy

linde

r (n=

14)

70% of patients obtained Cylinder under 0.5D post op

Clinical Study preliminary results (Sept 2013)

≤ -1.5

-1.5 to -1

-1 to -0

.5

-0.5 to +0

.5

+0.5 to

+1

+1 to

+1.5

+1.5<

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

Spherical equivalent refraction Post-Op (1-3 Months)

Spherical Equivalent Refraction - Targeted refraction (Diopters)

Perc

enta

ge o

f pati

ents

(n=1

4)

Clinical Study preliminary results (Sept 2013)

1 ≤

0.8 to 1

0.6 to 0.8

0.4 to 0.6

0.2 to 0.4

0 to 0.2

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

Visual Acuity Post-Op (1-3 Months)

UCVA

BCVA

Visual Acuity (Decimal)

Perc

enta

ge o

f pati

ents

(n=

14)

*Patient with refraction of: Sph=0, Cyl=0

*

Clinical Study preliminary results (Sept 2013)

≤ 33 to

55 to

77 to

9 9<0%

10%

20%

30%

40%

50%

60%

70%

Rotational Stability (1-3 Months)

Deviation from implanted position (Degrees)

Perc

enta

ge o

f pati

ents

(n=1

4)

* 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

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

Thank you