Method and system to identify intraocular pressure (IOP) of an eye
First Claim
1. A method to identify Intraocular Pressure (IOP) of an eye, said method comprising acts of:
- placing a foil-flap support assembly between an imaging unit and the eye, wherein the foil-flap support assembly has a transparent stiff foil fixed to a support and plurality of movable flaps suspended from the support facing the eye;
blowing air of predetermined amount of pressure onto an eye ball of the eye through an air channel, wherein the air blown to the eye ball rebounds from the eye ball deflecting the flaps of the support assembly;
capturing an image of the deflected foil-flap support assembly;
identifying plurality of parameters value of the captured image; and
comparing the plurality of parameters value with plurality of predetermined parameters value to identify IOP of the eye.
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Accused Products
Abstract
Non-tactile and non-evasive tonometer utilizing air flow with a definite amount of pressure to the eye and a mechanism to deflate the thin foil set that is placed near to eye ball such that re-bounded air hits on it. The mechanism involves acquiring or capturing then the images of the known pattern marking on thin foils both before and after deflating process due to rebounded air. On evaluating the deformation of the pattern appearing in the images obtained before and after air flow and calibrating the deformation with respect to size, translation, rotation and scaling parameters due the different pressure level that hits the eye ball and that rebounds on to thin foils, we arrive at a scheme of measuring the intraocular pressure of human eye. This intraocular pressure is used as a parameter for the ophthalmologist to diagnose glaucoma impairment of human beings.
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Citations
14 Claims
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1. A method to identify Intraocular Pressure (IOP) of an eye, said method comprising acts of:
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placing a foil-flap support assembly between an imaging unit and the eye, wherein the foil-flap support assembly has a transparent stiff foil fixed to a support and plurality of movable flaps suspended from the support facing the eye; blowing air of predetermined amount of pressure onto an eye ball of the eye through an air channel, wherein the air blown to the eye ball rebounds from the eye ball deflecting the flaps of the support assembly; capturing an image of the deflected foil-flap support assembly; identifying plurality of parameters value of the captured image; and comparing the plurality of parameters value with plurality of predetermined parameters value to identify IOP of the eye. - View Dependent Claims (2, 3, 4)
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5. A system to identify Intraocular Pressure (IOP) of an eye comprising:
a foil-flap support assembly comprising; a transparent stiff foil fixed to a support; and plurality of movable flaps flexibly facing an eye suspended from the support; a control unit comprising; a blowing unit having an air channel to blow air of predetermined amount of pressure on to an eye ball of the eye; an imaging unit to capture image of the foil-flap support assembly before and after deflection; a computing device to identify plurality of parameters value of the captured image and to compare the identified parameters value with a predetermined parameters value determined during a calibration to identify IOP of the eye; and a storage unit to store calibrated parameters value. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
Specification