| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 600399000 | Measuring impedance to flow of aqueous humor (tonometry) | 20 |
| 20090030299 | Non-contact type tonometer - A non-contact type tonometer includes a air injector for blowing air to a cornea of a subject's eye along a reference axis to deform the cornea, a projection optical system for projecting projection light onto the subject's eye, a light-receiving optical system for receiving reflected light which is projected from the projection optical system and reflected on the subject's eye, an alignment unit for positioning the projection optical system and the light-receiving optical system in the direction of the reference axis based on a light amount of the reflected light which is received by the light-receiving optical system and an intraocular pressure detector for detecting a deformation of the cornea based on the reflected light amount. The projection optical system includes a light flux shape regulator which regulates the projection light such that the projection light has a non-circular shape extending in a predetermined direction. | 01-29-2009 |
| 20090275819 | Non-contact ultrasonic tonometer - A non-contact ultrasonic tonometer for measuring intraocular pressure of an examinee's eye, in non-contact manner by use of an ultrasonic wave comprises: a probe including a vibrator for making the ultrasonic wave incident on the examinee's eye and a sensor for detecting the ultrasonic wave reflected from the examinee's eye; and an observation optical system for observing an anterior segment of the eye, wherein the probe is placed in an optical path of the observation optical system, and the observation optical system forms an image of the anterior segment through a surrounding region of the probe. | 11-05-2009 |
| 20090275820 | Non-contact ultrasonic tonometer - A non-contact ultrasonic tonometer for measuring intraocular pressure of an examinee's eye in non-contact manner by use of an ultrasonic wave comprises: a probe including a vibrator for making the ultrasonic wave incident on the eye and a sensor for detecting the ultrasonic wave reflected from the eye; a detection unit which detects an alignment state of the probe with respect to the eye; a determination unit which determines whether the alignment state is proper or not based on a detection result of the detection unit; a trigger signal generation unit which generates a trigger signal to start measurement based on a determination result of the determination unit; and a control unit which controls the probe to emit the ultrasonic wave based on generation of the trigger signal. | 11-05-2009 |
| 20090306493 | ARRANGEMENT IN A TONOMETER - The arrangement in a tonometer has a probe that is brought into contact with the surface of the eye and the intraocular pressure in the eye is derived from the variations in the velocity of the probe. The probe is formed of a piece of a non-magnetic substance. The arrangement includes a holder located in the tubular component and attached to a shaft providing the force for the measurement, in which holder there is a guiding means for guiding a movement of the probe along an internal surface of the tubular component. | 12-10-2009 |
| 20100069737 | Non-Contact ultrasonic tonometer - A non-contact ultrasonic tonometer for measuring intraocular pressure of an examinee's eye in a non-contact manner by use of an ultrasonic wave comprises: a probe that emits an ultrasonic beam to be allowed to enter the eye and detects the ultrasonic beam reflected by the eye; and an arithmetic section that determines the intraocular pressure by processing an output signal from the probe, the probe including a broadband air-coupled transducer that transmits and receives the ultrasonic beam having a broadband frequency component. | 03-18-2010 |
| 20100145180 | Apparatus for physical measurements of the eye - Utilization of a contact device placed on the eye in order to detect physical and chemical parameters of the body as well as the non-invasive delivery of compounds according to these physical and chemical parameters, with signals being transmitted continuously as electromagnetic waves, radio waves, infrared and the like. One of the parameters to be detected includes non-invasive blood analysis utilizing chemical changes and chemical products that are found in the conjunctiva and in the tear film. A transensor mounted in the contact device laying on the cornea or the surface of the eye is capable of evaluating and measuring physical and chemical parameters in the eye including non-invasive blood analysis. The system utilizes eye lid motion and/or closure of the eye lid to activate a microminiature radio frequency sensitive transensor mounted in the contact device. The signal can be communicated by wires or radio telemetered to an externally placed receiver. The signal can then be processed, analyzed and stored. Several parameters can be detected including a complete non-invasive analysis of blood components, measurement of systemic and ocular blood flow, measurement of heart rate and respiratory rate, tracking operations, detection of ovulation, detection of radiation and drug effects, diagnosis of ocular and systemic disorders and the like. | 06-10-2010 |
| 20110015512 | MEASURING OUTFLOW RESISTANCE/FACILITY OF AN EYE - A measurement system takes measurements of intraocular pressure and displaced ocular volume for determination of aqueous outflow resistance A device with a πgid outer wall, a flexible inner wall, and an inflatable bladder in between is placed over the eye A pressure measurement system is coupled to the bladder and is configured to measure a pressure of fluid within the bladder A hydraulic unit is coupled to the bladder and configured to control a flow of fluid between the bladder and an external reservoir, and to measure a change of volume in the bladder created by the pressure applied to the eye Both the pressure measurement system and hydraulic unit are directly controlled by and communicated with a microprocessor/computer In addition, the microprocessor computes the outflow resistance of the eye as a function of the pressure in the bladder and the change of volume in the bladder over time. | 01-20-2011 |
| 20110087086 | Method of Estimating Ocular Perfusion Pressure - A microprocessor-controlled tonometer measures both systole and diastole occurring in intraocular pressure so that this information can be used to estimate perfusion pressure. The microprocessor determines a ratio between ocular pulse amplitude and mean intraocular pressure, derives a multiplier from the ratio, multiplies the mean intraocular pressure by the multiplier to estimate mean central retinal artery pressure, and then estimates perfusion pressure by subtracting mean intraocular pressure from the estimate of central retinal artery pressure. | 04-14-2011 |
| 20130085369 | GOLDMANN APPLANATION TONOMETER, BIOMICROSCOPY DEVICE AND RELATED METHODS - Apparatus and methods for subjecting a patient to an slit lamp microscopy and/or Goldmann tonometry eye examination are disclosed herein. In some embodiments, the patient is in a side-lying down position at a time of the examination. In some embodiments, it is possible to examine an upper and/or lower eye—for example, a lower eye slightly above a supporting surface. Related apparatus are disclosed herein. In some embodiments, the apparatus includes a bed and/or a headrest and/or a face immobilization assembly are disclosed herein. | 04-04-2013 |
| 20130158381 | External Pressure Measurement System and Method for an Intraocular Implant - An IOP monitoring device for implantation in an eye of a patient may include a first tube having a first opening, the first tube being configured to extend into an anterior chamber of the eye and extend to a first sensor outside the anterior chamber. The first sensor may be in fluid communication with the first opening of the first tube. The device also may include a second tube having an opening spaced from a second sensor. The opening of the second tube may be configured to be exposed to a pressure representative of atmospheric pressure, with the second sensor being in fluid communication with the second opening. In one aspect, a patch is attachable to a globe of the eye and configured to lie over the opening of the second tube and secure the opening in place in the eye. | 06-20-2013 |
| 20130184554 | DEVICE FOR MONITORING INTRAOCULAR PRESSURE - Disclosed is a device adapted to measure intraocular pressure comprising: a corneal contact lens having a pressure sensor mounted in a recess or cavity in the contact lens, and wherein the contact lens has a back surface which is formed so as to protrude in a desired portion beyond the profile of the adjacent part of the lens and thus to press against the cornea, which protruding portion experiences a reactive deformation which is detected directly or indirectly by the pressure sensor. | 07-18-2013 |
| 20140073897 | OPHTHALMOLOGICAL INSTRUMENT - Ophthalmological device including an applanation tonometer tip having a bi-curved cornea-contacting surface and method of using such device for measurement of intraocular pressure. The cornea-contacting surface includes a first rotationally symmetric portion a curvature of which is substantially adapted to that of a typical cornea and a second rotationally symmetric portion that is peripheral to and adjoining the first portion. In operation, the applanation of the cornea in an area corresponding to the first portion of the cornea-contacting surface is substantially negligible. | 03-13-2014 |
| 20140155726 | Dynamic tonometry device and method for controlling coaxiality of probe with eyeball - A dynamic tonometry device includes a probe, a housing, a sleeve, a light source, an image sensor, a pressure sensor, a microprocessor and a display storage. The probe is a truncated cone with small at left and large at right. The sleeve is fitted on the probe. An end face of a small end of the probe is situated to a left of a left end face of the sleeve. A right end of the sleeve is connected to a left end of the housing; on a large end of the probe is installed the pressure sensor; inside the housing are installed the light source and the image sensor. Light emitted by the light source is collimated into a light beam which is incident to the probe and totally reflected before entering the image sensor. With the microprocessor are connected the pressure sensor, the image sensor and the display storage. | 06-05-2014 |
| 20140163352 | Portable Tonometer - An applanation tonometer uses an active pixel sensor array to accurately detect total illumination in a region surrounding an applanated area so that a microprocessor can determine the applanated area based on an inversion of the illumination received by the sensor. | 06-12-2014 |
| 20140257075 | MEASURING AQUEOUS HUMOR OUTFLOW - Technologies are provided to estimate in vivo aqueous humor outflow for a subject. The method can include: preparing a virtual casting of the outflow network of the subject by use of background subtraction and contrast enhancement; tracing network terminal branches in said reduced virtual casting; obtaining Doppler data for at least some of the terminal branches, to calculate a fluid velocity within each of such terminal branch; then pairing each fluid velocity for each such terminal branch with a measurement of cross-sectional area for that terminal branch, thereby to provide a plurality of volumetric flow values; and integrating over the plurality to obtain a volumetric estimate of aqueous humor outflow for the subject. | 09-11-2014 |
| 20140275937 | APPARATUS AND METHODS FOR COMPUTING CARDIAC OUTPUT OF A LIVING SUBJECT VIA APPLANATION TONOMETRY - Apparatus and methods for calculating cardiac output (CO) of a living subject using applanation tonometry measurements. In one embodiment, the apparatus and methods build a nonlinear mathematical model to correlate physiologic source data vectors to target CO values. The source data vectors include one or more measurable or derivable parameters such as: systolic and diastolic pressure, pulse pressure, beat-to-beat interval, mean arterial pressure, maximal slope of the pressure rise during systole, the area under systolic part of the pulse pressure wave, gender (male or female), age, height and weight. The target CO values are acquired using various methods, across a plurality of individuals. Multidimensional nonlinear optimization is then used to find a mathematical model which transforms the source data to the target CO data. The model is then applied to an individual by acquiring physiologic data for the individual and applying the model to the collected data. | 09-18-2014 |
| 20140296688 | SURFACE DEFORMATION SENSOR - A surface deformation sensor that includes a resonance circuit is described herein. The resonance circuit includes a sensing capacitor and inductive coil. The resonance circuit receives an external signal, which causes the resonance circuit to resonate at a resonance frequency. A surface deformation of an object can be determined based on the resonance frequency. | 10-02-2014 |
| 20150313573 | OPHTHALMIC ELASTOGRAPHY - This invention describes an ultrasound technique that maps out the mechanical properties of the cornea and the sclera to the intrinsic mechanical loadings in the eye. It helps identify the abnormally weaker or stiffer regions in the eye, to add functional information for early and definitive diagnosis of corneal diseases, surgical planning, prevention of surgical complications, as well as better interpretation of tonometric readings. This technique will allow a spatial mapping of the mechanical strains developed in the cornea or the sclera during ocular pulse or other intraocular pressure fluctuations. The envisioned use of this technique resembles the current clinical ophthalmic ultrasound in terms of the patient experience, but provides functional information about the eye tissue that is not available from current clinical ultrasound. | 11-05-2015 |
| 20160051145 | SYSTEMS AND METHODS FOR MONITORING EYE HEALTH - Systems and methods for monitoring eye health. The systems and methods monitor eye health by measuring scleral strain by way of an implantable monitor, a wearable monitor configured in eyeglasses, or an external monitor using a portable tablet computing device. | 02-25-2016 |
| 20160081549 | EYE SURGERY SYSTEM AND METHOD OF OPERATING AN EYE SURGERY SYSTEM - A method of operating an eye surgery system comprises operating actuators of a stand such that an apparatus for measuring the refraction of an eye is located in a measurement position relative to the eye; measuring at least one condition of the eye and determining at least one condition value representing the at least one measured condition of the eye; measuring the refraction of the eye and determining at least one refraction value presenting the measured refraction of the eye, wherein a time distance between the measuring of the condition of the eye and the measuring of the refraction of the eye is smaller than a predetermined duration; and outputting the at least one refraction value representing the measured refraction of the eye only when the condition value representing the measured condition of the eye is within a predetermined range of values. | 03-24-2016 |
