pooja b. jamnadas md, marie brenner, ms4, peter russo, od, shuchi patel md loyola university medical...
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Pooja B. Jamnadas MD, Marie Brenner, MS4, Peter Russo, OD, Shuchi Patel MDLoyola University Medical Center, Department of Ophthalmology, Maywood IL
At our institution
INTRODUCTION
RESULTS
CONCLUSIONS
•IRB approved, prospective case control study
•27 patients that presented to the Loyola eye clinic were recruited for the study
•Patients were provided appropriate informed consent and made aware of the risks and benefits of participation
•Patient’s RNFL was measured with and without their daily contact lenses in place
•We studied refractive error, RNFL, Q value with and without contact lenses in place
•Subgroup analysis was conducted with chi square analysis analyzing whether a refractive error ≤ -2.0, between -2.5-5.0, and >-5.0 diopters impacted pertinent variables
•15 eyes had astigmatism
•For patients with astigmatism, measurements were recorded in the axis of astigmatism and 90 degrees away
METHODS
Retinal nerve fiber layer (RNFL) measurements are often used to
aid ophthalmologists in the diagnosis and management of
glaucoma. One of the challenges in measuring RNFL is obtaining
good quality scans with accurate measurements. Our study
serves to report the effects of contact lenses wear on RNFL
measurements. Furthermore we sought to determine if the
degree of refractive error impacts RNFL measurements or Q
values and if the measurements in the axis of astigmatism and
90 degrees from the axis of astigmatism differ.
•Overall, there was no statistically significant difference in RNFL or Q value with and without contact
lens wear
• In subgroup analysis with regards to refractive error, the difference in Q value was only statistically
significant in patients with a refractive error between -2.50 and -5.00 diopters of myopia
• In subgroup analysis with regards to refractive error, there was no statistically significant difference
in RNFL measurements with and without contact lenses
•When examining the difference in RNFL measurements with and without contact lenses in the axis of
astigmatism compared to measurements 90 degrees from the axis of astigmatism, there was no
statistically significant difference in measurements
Purpose: The purpose is to determine if statistically significant
differences exist between retinal nerve fiber
layer(RNFL) measurements and quality (measured in Q
value) of optical coherence tomography(OCT) studies in
patients with and without contact lenses. We compared
patients with increasing amounts of refractive error and
patients with astigmatism.
Methods: After obtaining IRB approval and consent, patients in
the Loyola eye clinic had their RNFL measured with and
without contact lenses using the Heidelberg Retina
Tomograph. The patient's refractive error, RNFL, and Q
value were recorded. A paired t test was used
comparing the average RNFL and Q value with and
without contact lenses. A subgroup analysis was done
examining the effect of increasing refractive error on
the RNFL and Q value measurements. For patients with
astigmatism, an unpaired t-test was used to compare
the change in RNFL with and without contacts, both in
the axis of their astigmatism and 90 degrees away from
their axis of astigmatism.
Results: No statistically significant difference is present in RNFL
measurements and OCT quality with or without contact
lens wear overall. Subgroup analysis only found a
statistically significant difference in Q value
measurements in patients between -2.50 and -5.00 of
myopia. Subgroup analysis for increasing refractive
error showed no statistically significant difference in
RNFL measurements. The difference in RNFL
measurements with and without contact lenses in the
axis of astigmatism compared with measurements 90
degrees from the axis of astigmatism was also not
statistically significant.
Conclusions:We conclude that according to our study there is no
statistically significant difference in OCT RNFL
measurements and quality of measurements with and
without contact lenses. The only subgroup that does
show a statistically significant difference are patients
with -2.50 to -5.00 diopters of myopia when measuring
Q value. This subgroup also had the largest number of
patients. Therefore we need to extend our study to
include more patients with higher refractive errors to
see if a larger n will allow for results to reach statistical
significance.
Financial Disclosures: None
Acknowledgements:
The Richard A. Perritt Charitable Foundation
ABSTRACT RESULTS
CORRELATION OF RETINAL NERVE FIBER LAYER MEASUREMENTS WITH AND WITHOUT CONTACT LENSES MEASURED IN PATIENTS
WITH ASTIGMATISM
Comparison of difference in RNFL measurements with and without
contact lenses in axis of astigmatism compared to 90 degrees from axis
of astigmatism
Contact Lenses
No Contact Lenses
Comparison of Q value with and without contact lenses
Comparison of RNFL with and without contact lenses
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