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

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If you can't reduce the diameter
Consider a 2D toric haptic

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Large Bubble

Too much saline was lost during insertion
Reinsert the lens

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Foggy/Debris Buildup

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

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

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Increase/Decrease Central Clearance

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

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

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

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

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Over 200 microns
Contact consultation

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Limbal Clearance

Limbal Bearing

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

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

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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

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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

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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

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Edge Lift

If you have edge lift 360°
Contact consultation

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If you have edge lift at 12 & 6
Add 3D toric haptic

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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

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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

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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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