RT Journal Article
T1 Comparative analysis of anterior corneal surface characteristics measured by two topographers and two autokeratometers
A1 Noya Padín, Verónica
A1 Pena Verdeal, Hugo
A1 García Queiruga, Jacobo
A1 Nores Palmás, Noelia
A1 Castro Giráldez, Alba
A1 Yebra-Pimentel Vilar, Eva
K1 Agreement corneal topograph
K1 Agreement autokeratometer
K1 EyeSys
K1 Easygraph
K1 ARK
AB Background: Precise quantification of corneal parameters enhances the clinical of the anterior corneal surface for various clinical assessments, with ongoing research focusing on optimizing everyday practice through device comparison studies. The study aimed to compare the agreement on the anterior corneal surface characteristics values measured by four commercially available devices: EyeSys 2000, Oculus Easygraph, ARK700A and ARK510A. Methods: Observational cross-sectional study involving 50 eyes from healthy volunteer recruited among subjects attending for an eye examination. Corneal radius minimum keratometry reading (min-K) and maximum keratometry reading (max-K), astigmatism axis and eccentricity were measured in all participants with EyeSys, Oculus Easygraph, ARK700A and ARK510A. Measurements were performed three times only in the right eye in random order by four optometrists who were unaware of the results of the other researchers. Results: A statistically significant difference occurred for the measurements of the corneal radius (Greenhouse-Geisser and Huynh-Feldt: P≤0.001 for both max-K and min-K radius) and the axis of astigmatism (Friedman: P<0.001), between the four devices. Pairwise comparisons revealed no radius differences between Oculus Easygraph and ARK510A (Sidak: min-K radius, P=0.231; max-K radius, P=0.224), and no axis differences in all pairwise analyses that have not imply the EyeSys (Wilcoxon: all P≥0.130). There was no statistical difference in the eccentricity value obtained by the topographers (paired t-test: P=0.507). Conclusions: The present study showed that EyeSys 2000 measurements differed from those of the other devices across all parameters. Alternatively, both topographers showed a perfect agreement concerning eccentricity measurements in everyday practice.
PB AMJ
SN 2520-0518
YR 2024
FD 2024
LK http://hdl.handle.net/10347/34551
UL http://hdl.handle.net/10347/34551
LA eng
NO Noya-Padin V, Pena-Verdeal H, García- Queiruga J, Nores-Palmas N, Castro-Giraldez A, Yebra- Pimentel E. Comparative analysis of anterior corneal surface characteristics measured by two topographers and two autokeratometers. AME Med J 2024
DS Minerva
RD 23 abr 2026