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Table 3 Sample numerical results obtained from the presented software (in brackets they are given after unit conversion for the size 0.15 mm/pixel and time 231 μm/pixel)

From: Open source software for the analysis of corneal deformation parameters on the images from the Corvis tonometer

Measured parameter

Value

Data source origin

Hard drive

Source File

Test082.jpg

Image number

82

Frequency of the first harmonic

309 ± 160 Hz

Applanation time

29 and 96 pixels (6.7 ms, 22.2 ms)

Difference in corneal deformation

Minimum −12.1 pixels (1.8 mm) and maximum 20.7 pixels (3.1 mm)

Amplitude of the eyeball response

29 and 19 pixels (4.3 mm, 2.9 mm)

Maximum corneal deformation

66.6 pixels (10 mm)

Maximum corneal deformation for the frequency > 100 Hz

−1.1 2 pixels (−1.7 mm, 0.3 mm)

Amplitude of the first harmonic

0.2 pixel (0.03 mm)

Amplitude of the first harmonic measured at the highest points of curvature

0.16 and 0.15 pixel (24 μm, 22 μm)

Location of points with the greatest curvature during deflection over time

272 and 323 pixels (63.1 ms, 74.6 ms)