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The Contex OK® Lens and Bausch & Lomb Vision Shaping Treatment™

The world’s #1 overnight orthokeratology lens is now overnight FDA approved. The OK® E-System is the premier Bausch & Lomb Vision Shaping Treatment™ (VST) lens design. FDA approved, safe and reversible, More…

 
Dispensable Inventory sets allow instant dispensing to most patients by using a simple cross-reference chart or the OK® Lens calculator. Our recommended sets are listed below.

Numbered Sets
1/4 diopter Flat CK and 1/2 diopter Target Power
Set Type Flat Central K Range Target Myopia Reduction Range
143 Lens
Most Popular Set
41.00 to 45.50 -1.25 to -5.00
219 Lens 41.00 to 45.50 PL to -5.00
1/4 diopter Flat CK and 1/4 diopter Target Power
247 Lens 41.00 to 45.50 -2.00 to -5.00
323 Lens Set 41.00 to 45.50 -1.00 to -5.00
399 Lens Set 41.00 to 46.00 -0.50 to -5.00

Sample Case:
CK's 43.00/44.00 Spectacle-Rx: -4.00 Eccentricity Value = .5

Primary Lens: 43.00/-4.00(.5e) / 8.82 / 10.6 / +1.00

Sample Cross-Reference Chart

CK/Spec-Rx
Lens Color
-3.00
-3.50
-4.00
-4.50
-5.00
           
42.00/8.04
RED
42.00/-3.00
42.00/-3.50
42.00/-4.00
42.00/-4.50
42.00/-5.00

42.50/7.94
YELLOW

42.50/-3.00
42.50/-3.50
42.50/-4.00
42.50/-4.50
42.50/-5.00
43.00/7.85
VIOLET
43.00/-3.00
43.00/-3.50
43.00/-4.00
43.00/-4.50
43.00/-5.00
43.50/7.76
RED
43.50/-3.00
43.50/-3.50
43.50/-4.00
43.50/-4.50
43.50/-5.00
44.00/7.67
YELLOW
44.00/-3.00
44.00/-3.50
44.00/-4.00
44.00/-4.50
44.00/-5.00


If Primary Lens Is Too Tight:
Up and left on the chart loosens the losses the fit but keeps the same myopia reduction. From the example above, the next loosest lens with the same base curve is 42.50/-3.50(.5e)

If Primary Lens Is Too Loose:
Down and right on the chart tightens the fit but keeps the same myopia reduction. From the example above, the next loosest lenswith the same curvebase is 43.50/-4.50(.5e)

Use the legend bellow to adjust the fit and amount of reduction
Up and Left = Loosens fit with same myopia reduction
Up and Right = Loosens fit with more myopia reduction

Down and Right = Tightens fit with same myopia reduction
Down and Left = Tightens fit but decreases the myopia recution

Right = Same fit with more myopia Reduction
Left = Same fit with less myopia Reduction

Click here to download the OK E-System Inventory Set Troubleshooting Chart Download PDF


   
 
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