VisTor

The Premium Toric Solution

Technical Specifications

Overall diameter……….

11.0 mm

11.5 mm for IOL power ≤16D

Optic diameter…………… 6.00 mm
Haptic angulation………..
Edge design……….. 360° Continuous Square Edge
Optic design……………… Aspheric with Toric surface on anterior plane
Standard Range
Power* (spherical equivalent)

Cylinders*

+10.0D to +30.0D (0.5D increments)

1.0D to 6.0D (0.5D increments)

* Additional power/cylinder range can be supplied by special order
Material…………………… Hydrophilic Acrylic HEMA/EOEMA copolymer
Filtration…………………… UV Blocker and violet light filter
Refractive Index…………. .1.46 (hydrated @ 35°c)
Y.A.G laser……………….. Compatible
Estimated A-CONSTANT (SRK/T)……. Optical / Immersion Biometry: 117.7
Contact US Biometry: 117.3
Placement………………… Capsular Bag
CE Approved  

*It is recommended that surgeons personalize their A-constant based on their surgical techniques and equipment, experience and postoperative results. For more information please visit Hanita Lenses web site.

Attributes

Advanced Optical Design


Leveraging Hanita Lenses’ decades long experience in developing advanced IOLs, VisTor’s optical design is based on Hanita Lenses’ clinically proven aspheric IOL. The optical profile of the VisTor lens was calculated using ZEMAX™ simulation software in order to minimize all aberrations, including the spherical aberration of the cornea, and to optimize the modulation Transfer Function (MTF).
 
The optical design of the VisTor lenses utilized the advanced Arizona Eye model (1), the premier model for toric lens design due to its close correspondence to clinical level of aberrations, both on and off-axis. In this eye model, unlike others, the retina curvature is designed to split the tangential and sagittal foci off-axis, providing an optimal platform for correction of toric aberration. The result is an accurate simulation of the visual performance of the VisTor in the post-operative eye.
 
(1) Field guide to Visual and Ophthalmic optics: Jim Schwiegerling, November 2004

 

 

Geometrical Design


  • VisTor ensures excellent stability and centration due to the plate design
  • High level of rotational stability is achieved due to the wide angle of contact with the capsular bag

 

 

 

VisTor™  IOL Calculator

 

Placement of the IOL is determined by the VisTor IOL Calculator, which uses an advanced formula based on Hanita Lenses’ vast experience and data collected over many years by the company.

 

 

 

The VisTor™ Advantage


  • Premium solution for correction of astigmatism in cataract patients
  • Reduces spherical aberration to a minimum
  • Improves night vision
  • Designed with the most advanced optical tolls and models

 

 

Material

 

VisTor is made of a hydrophilic acrylic material proven in many years of clinical experience. Characterized by excellent biocompatibilty, and mechanical quality. Incorporates a violet  filtering chromophone for improved retina protection.

VisTor