US 11,925,413 B2
Determining ophthalmic parameters
Arash Ghareh Baghi, Västerås (SE); Mozaffar Yousefi, Tehran (IR); and Mehdi Salehi, Tehran (IR)
Assigned to Arash Ghareh Baghi, Västerås (SE)
Appl. No. 18/253,277
Filed by Arash Ghareh Baghi, Västerås (SE)
PCT Filed Nov. 23, 2021, PCT No. PCT/SE2021/051163
§ 371(c)(1), (2) Date May 17, 2023,
PCT Pub. No. WO2022/115020, PCT Pub. Date Jun. 2, 2022.
Claims priority of application No. 2051370-1 (SE), filed on Nov. 25, 2020.
Prior Publication US 2023/0346213 A1, Nov. 2, 2023
Int. Cl. A61B 3/10 (2006.01); A61B 3/16 (2006.01)
CPC A61B 3/1005 (2013.01) [A61B 3/16 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A computer-implemented method for analysing a time-velocity curve, the time-velocity-curve comprising registered velocity and time of a probe body (2) during movement of the probe body in a first direction travelling towards a corneal outer surface of an eye of a subject, during impact of an end (2a) of the probe body (2) with the corneal outer surface (b), when completely stopped on the eye (c), and during rebound movement of the probe body (2) in a second direction, opposite to the first direction,
the computer-implemented method comprising calculating an intraocular pressure (ρ) of the eye as a slope in the time-velocity curve between a time when the end of the probe body (2) first impacts the corneal outer surface (b) and the time when the probe body (2) is completely stopped on the eye (c), and calculating a central cornea thickness (D) using a velocity of the probe body (2) in the time-velocity curve at a moment of contact of the end (2a) of the probe body (2) with the corneal outer surface (b), Vr, and a velocity of the probe body (2) in the time-velocity curve at a moment when the probe body (2) leaves the corneal outer surface during rebound movement of the probe body (2) in the second direction, Vb.