Virtual Troubleshooting Guide – EUROPA

Virtual Troubleshooting Guide
for Europa Scleral® Lenses

Central Clearance

Decentration

If the lens is decentering
Reduce diameter by 0.5mm which reduces overall sagittal depth by 100 microns and increase BC by 1D to compensate for the sagittal depth loss

 

If you can't reduce the diameter

Large Bubble

Too much saline was lost during insertion

Foggy/Debris Buildup

Evaluate haptic alignment with flourescein
If bleeds in at 12/6 then consider 3D toric haptic

 


If it doesn't bleed in at 12 & 6
Check for excessive central or limbal clearance

 

Increase/Decrease Central Clearance

50 microns
Steepen/flatten base curve and PC1 by 0.5D

 


100 microns
Steepen/flatten base curve and PC1 by 1D

 


150 microns
Steepen/flatten base curve by 1.5D and PC1 by 1.5D

 


200 microns
Steepen/flatten base curve by 2D and PC1 by 2D

 


Over 200 microns


Limbal Clearance

Limbal Bearing

If you see slight bearing in the superior nasal quadrant
That is normal and no change is necessary

 


For extra large diameter corneas
Increase diameter by 0.5mm, flatten BC by 1D to compensate for increased central SAG height

 


If you can't increase the diameter
Steepen the Reverse curve by 1.50D and flatten the BC by 1D to compensate for increased sagittal depth

 



Haptic Alignment

Compression and Blanching

If you have slight compression in superior quadrant only and not affecting the cornea
That is normal and no change is necessary

 


If you have compression 360°
Flatten PC2 and PC3 by 0.5mm – steepen BC 1D for each 0.5mm in PC changes in PC2 and PC3

 

Edge Lift

If you have edge lift 360°

If you have edge lift at 12 & 6


Diameter

Increase diameter by 0.5mm
Increases sagittal depth by 100 microns, to offset for the increase of sagittal depth flatten BC and PC1 by 1D

 

Decrease diameter by 0.5mm
Decreases sagittal depth by 100 microns, to offset for the decrease of sagittal depth steepen BC and PC1 by 1D

 


 

Contact Information

Address:
Visionary Optics
1325 Progress Drive
Front Royal VA 22630

Customer Service:
Toll Free: 877-533-1509
Direct Dial: 540-636-7976
Fax: 540-635-8846

Ordering

Our Visionary Optics consultation team can make even the most challenging fits possible and is here to assist. Call, email or complete the online ordering form and we can design the best custom lens for your patient.

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