JUNE 2019 | EYEWORLD | 61
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Dr. Grover thinks corneal hysteresis mea-
surement is especially useful for low tension
glaucoma or early glaucoma cases, finding that it
helps him risk stratify. Dr. Radcliffe also said he
measures hysteresis on almost all of his patients
at some point within the first year.
"[Hysteresis] tells me how their eye is toler-
ating pressure," he said. "Another way to think
of it is how much biomechanical stress this eye
is experiencing from pressure."
The Ocular Response Analyzer also pro-
vides a measurement called corneal compensat-
ed IOP (IOPcc). This, Dr. Grover explained,
takes into consideration the corneal hysteresis
and other factors to give an output of what
Reichert thinks the true IOP actually is. When
corneal hysteresis is low, Dr. Grover observed,
there is usually a discrepancy between IOPcc
and the Goldman applanation measurement.
At the 2019 Surgical Summit, Dr. Grover said
the relationship between IOPcc and Goldman
needs further investigation.
Dr. Radcliffe said corneal hysteresis serves
as a model for technological adoption. In this
case, he said, there is good data showing that
this measurement is clinically helpful.
"But we don't have a great economic story
and in modern ophthalmic times, often proce-
dures that have better reimbursement will grow
faster, but the data is very clear that this test
helps us better care for patients with glauco-
ma," he said. "I think it's only a matter of time
before it is the standard of care."
Financial interests
Grover: Reichert Technologies
Radcliffe: Reichert Technologies
