Fluorescein Pattern
Identification Guide
2D flatter than "K"
Excessive apical bearing
Excessive edge clearance
2D steeper than "K"
Excessive apical pooling
Excessive peripheral seal off
1D flatter than "K"
Excessive apical bearing
Excessive edge clearance
1D steeper than "K"
Excessive apical pooling
Excessive peripheral seal off
Alignment pattern
Even pattern centrally
Appropriate clearance peripherally
Spherical BC on 3D WTR cornea
Horizontal bearing
Excessive vertical pooling
Without yellow filter
Pattern observed without the use of yellow filter
over observation system
With yellow filter
Identical pattern with the addition of yellow filter – notice greater fluorescence
"On K" BCR with 9.5mm OAD: 8.4mm OZ
Apical clearance
Insufficient peripheral clearance
"On K" BCR with 9.5mm OAD: 7.6mm OZ
Apical Alignment
Greater peripheral clearance
Bicurve Design w/10.0mm PCR: 0.5mm wide
Acceptable edge clearance,
narrow width
Bicurve Design w/10.0mm PCR: 1.0mm wide
Increase in edge clearance
Bicurve Design w/9.0mm PCR: 0.8mm wide
Insufficient edge clearance
Bicurve Design w/12.0mm PCR: 0.8mm wide
Greater clearance