Transcript Diapositiva 1 - ASCRS/ASOA 2008

MEASUREMENT TO COMPARE THE CORNEAL
CENTRAL THICKNESS WITH PENTACAM, VISANTE
AND ULTRASONIC PACHYMETRY AT
OFTALMOSALUD EYE INSTITUTE
Authors: Miranda Mauricio, MD; Gutarra Villavicencio Rosario del Pilar, MD;
Izquierdo Jr. Luis, MD; Cañote Flores Renzo, MD; Bernilla F . César, MD.
Institution: Instituto de Ojos Oftalmosalud
Address: Av. Javier Prado Este 1142 San Isidro.
*The authors have no financial interest in the materials being presented
PURPOSE
To compare the values of measurement of corneal
thickness obtained by Pentacam, Visante and Ultrasonic
Pachymetry.
MATERIALS AND METHODS
Prospective, comparative simple study of corneal pachymetry,
in a sample of 54 eyes of 54 patients taken care of at
OFTALMOSALUD Eye Institute during the period, between
November and December of the year 2006.
The values of corneal thickness were obtained by 3 devices
(Visante®, Pentacam® and ultrasonic Pachymeter
Accutome®).
MATERIALS AND METHODS
Inclusion criteria considered:
- Age greater than 18 years old
- Patient that accepts to participate voluntarily in the study.
- Do not have corneal pathology with the exception of keratocono, any
ocular surgery or use of contact lenses.
-Do not have family history of ocular disease or systemic disease with
ocular manifestations
Exclusion criteria considered:
- Age lower than 18 years old.
- Pregnant women
- Previous refracting Surgery
- Corneal Pathology except keratocono, ocular surgery or use of contact
lenses
- Family History of ocular disease or systemic disease with ocular
manifestations.
MATERIALS AND METHODS
All the measurements were made in the afternoon
between 4 and 6 p.m., with the purpose of avoiding the
normal diurnal variations of the corneal thickness.
These studies gave a level of confidence of 95%, during
this study 54 subjects showed a probability to have 80% to
detect 45µm, of difference in averages.
RESULTS
The age average of patients was of 28,52 + - DS 7.89. The patient with
smaller age was 18 years old and the one of greater age was 58 years old.
The 85,2% (46 patients) were of female sex and 14.8% (8 patients) male.
RESULTS
We obtained a medium correlation between the VISANTE and U.S.
of 0,647 (64,7%) and between U.S. and PENTACAM of 0,690 (69%).
RESULTS
RESULTS
CONCLUSIONS
There were variations in the readings of corneal central
thickness between the 3 devices.
The measures of central corneal thickness in normal eyes with
Pentacam revealed an excellent correlation with the results
obtained with ultrasonic pachymetry.
The measures of corneal thickness with the Visante System
turned out to be smaller than with the Pentacam and ultrasonic
pachymetry.
The results suggest that the Pentacam and the U.S. is equally
precise, giving similar readings.
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