Fluorescein Pattern Identification Guide

2D flatter than “K”
Excessive apical bearing,
excessive inferior edge
standoff
2D steeper than “K”
Excessive peripheral sealoff
1D flatter than “K”
Excessive apical bearing,
excessive inferior edge
standoff
1D steeper than “K”
Mild peripheral sealoff
Alignment pattern
Even pattern centrally with
slightly greater clearance
peripherally
Spherical BC on 3D WTR
astigmatic cornea

Horizontal bearing and
excessive vertical pooling
is observed
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” BC with a 9.5mm Dia;
8.4mm OZ

Observe apical clearance
and insufficient peripheral
clearance
“On K” BC with a 9.5mm Dia;
7.6mm OZ

A more alignment fitting
relationship with greater
peripheral clearance
Bicurve design with a
10.0mm PCR; .5mm wide

Acceptable edge clearance,
though narrow in width
Bicurve design with a
10.0mm PCR; 1.0mm wide

An increase in edge clearance
can be observed
Bicurve design with a
9.0mm PCR; .8mm wide

Insufficient edge clearance
can be observed
Bicurve design with a
12.0mm PCR; .8mm wide

Observe greater clearance

Fitting Pearls