Influence of Age on Corneal Deformation Parameters
Purpose
To evaluate the influence of age on corneal deformation parameters during non-contact tonometry in healthy eyes.
Methods
Observational, retrospective study involving one eye randomly selected from 89 healthy patients matched for CCT and IOP. Age groups were defined: 10-30 years-old (yo); 31-50 yo; 51-70yo; 71-90yo. Non-contact Tonometry wiuth ultra-high-speed (UHS) Scheimpflug imaging (Oculus Corvis ST; Wetzlar, Germany) was performed in all cases. Kruskall-Wallis test was used to evaluate the difference among the different age groups. The regression multiple analysis was also applied.
Results
Mean patient age was 49.09 ± 21.82 years. The mean of IOP and CCT were same in all groups. The parameters from Corvis ST:1st Applanation Time, 2nd Applanation Time, 1st Applanation Length, curvature radius at highest concavity and ingoing velocity (Vin) had significant differences among the age groups. Using a multiple regression analysis, a combined paramter had correlation coeficient of 0.834 with age.
Conclusion
There is influence of age in some parameters derived from Corvis ST independently from IOP and CCT