Showing all 22 results

Artis Toric Calculator (Cristalens)

ORAOcular Residual Asigmatism- was introduced in 1997 from Noel Alpins MD to emphasize the frequent disparity of Topography to Refractive Astigmatic Vector. (20 years later is again the hot talk of the town) . Another Marker is TD (Topography Disparity), TIA (Target Induced Astigmatism) Vector, SIA (Surgical Induced Astigmatism) Vector and DV Difference Vector The ASSORT Software (10.000$ worth) is now “free” to be used by all registered users for single cases and single markers. You can calculate the ORA , Vector Planning, and Coupling Effect of LRI’s/ Excimer Laser Cases (Mixed Astigmatism).

Also Available there is an Excellent Toric IOL Calculator incorporating  different posterior Cornea Assumptions and a Version of Astigmatismfix.com to deal with the unhappy Toric IOL postop Result. 

http://www.assort.com/

ASSORT -free Version Online Astigmatism and much more- Calculations from Noel Alpins MD

ORAOcular Residual Asigmatism- was introduced in 1997 from Noel Alpins MD to emphasize the frequent disparity of Topography to Refractive Astigmatic Vector. (20 years later is again the hot talk of the town) . Another Marker is TD (Topography Disparity), TIA (Target Induced Astigmatism) Vector, SIA (Surgical Induced Astigmatism) Vector and DV Difference Vector The ASSORT Software (10.000$ worth) is now “free” to be used by all registered users for single cases and single markers. You can calculate the ORA , Vector Planning, and Coupling Effect of LRI’s/ Excimer Laser Cases (Mixed Astigmatism).

Also Available there is an Excellent Toric IOL Calculator incorporating  different posterior Cornea Assumptions and a Version of Astigmatismfix.com to deal with the unhappy Toric IOL postop Result. 

http://www.assort.com/

Keratometry Adjustor Calculator for Posterior Cornea Effect (goggintoric.com)

Prof Goggin of Australia has a special interest in toric control with cataract surgery.

This part of his Site www.goggintoric.com provides a practical way to incorporate posterior Cornea data to adjust Toricity in WTR vs ATR astigmatism of 0,75 D to 2,50 D. He overcorrects ATR  by x1,41 and undercorrects WTR by x 0.75 eyes.

Caveats:

1. Do not attempt this when utilizing sites already incorporating similar logistics (eg Barrett)

2. Do correct astigmtism at 0,75D level and consider utilizing manufacturers that have a 0,50D increment scale to have an accurate result.

3. Do not be afraid to flip the axis if required to minimize astigmatism: Patients don;t mind.

http://goggintoric.com/

 

 

 

Online Alcon ToricOL Calculator (Barrett/ Holladay I Formula)

The Alcon Online Toric IOL Calculator will choose appropriate Toric Lens in IQ, SA6A, ReSTOR +2.5 or +3.0 and PanOptix Toric but inserting the IOL Spherical Equivalent Power (usually from the IOLMaster) and Surgically induced Astigmatism which is NOT calculated for you anymore. (The Software redirects you to the Hill Site (www.sia-calculator.com) which needs from the user to register (free of charge)

https://www.myalcon-toriccalc.com/#/countryLanguage

the doctor-hill.com Site

this is probably the holy grail for elaborate discussions in IOL Calculation. Especially easy to access are the Bag vs Sulcus Power Adjustments and the Refractive Vergence Formula for power calculations in aphakia/exchange. (In this situation the astigmatismfix.com Site may be relevant!)

https://doctor-hill.com/

Toric Refractive Surprise Calculator (goggintoric.com)

Prof Goggin of Australia has a special interest in toric control with cataract surgery.

This part of his Site www.goggintoric.com provides an alternative to astigmatismfix.com to study refractive results after implantation and possible result of 2 potential means of action 1. Rotate lens in the eye. 2 effect of a lens exchanged (which power, which torus, which axis. No personal Experience

http://goggintoric.com/