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MEASUREMENT TO COMPARE THE CORNEAL CENTRAL THICKNESS WITH PENTACAM, VISANTE AND ... Craig JP, Brahma A, Malik TY, McGhee CN (2001) Comparison of corneal thickness ... – PowerPoint PPT presentation

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Title: Diapositiva 1


1
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 Addres
s Av. Javier Prado Este 1142 San Isidro.
The authors have no financial interest in the
materials being presented
2
PURPOSE
To compare the values of measurement of corneal
thickness obtained by Pentacam, Visante and
Ultrasonic Pachymetry.
3
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).
4
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.

5
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.
6
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.
7
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).
8
RESULTS
9
RESULTS
10
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.
11
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