Abstract: 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.

Abstract: A device including a contact tonometer tip having a bi-curved cornea-contacting surface structured to reduce, during the tonometric measurement, at least the measurement error caused by the presence of a fluid film between the tip and the cornea and/or the intra-corneal stress formed during the applanation deformation and occurring at a location of the tip-to-cornea contact area. Method for using such device for measurement of intraocular pressure while procuring values IOP with increased accuracy as compared to those obtained with the use of a conventional flat-surface tonometer tip. The cornea-contacting surface includes a first central portion and a second portion that encircles and adjoins the first central portion. The curvatures of the first and second portions have opposite signs. In one case, the first central portion has a curvature with the same sign as that of the cornea and/or is rotationally-symmetric.

Abstract: Transducer probes for ophthalmological instruments operating without the use of light (such as contact tonometers and ultrasound pachymeters) - whether structured substantially monolithically (as one piece) or in a hybrid or composite fashion (and, therefore, reversibly separable into constituent components) - the axially-located front transducer surface of which is surrounded by a ridge of material not representing the surface of the transducer, in which the overall front comea-contacting surface of which is inwardly shaped to reduce or even completely avoid measurement errors associated with the use of conventionally-structured versions of probes traditionally use with such instruments. Ophthalmological instruments utilizing such probes and methods of use. Biological protection of eye during use of such instruments.

Abstract: Transducer probes for ophthalmological instruments operating without the use of light (such as contact tonometers and ultrasound pachymeters)—whether structured substantially monolithically (as one piece) or in a hybrid or composite fashion (and, therefore, reversibly separable into constituent components)—the axially-located front transducer surface of which is surrounded by a ridge of material not representing the surface of the transducer, in which the overall front cornea-contacting surface of which is inwardly shaped to reduce or even completely avoid measurement errors associated with the use of conventionally-structured versions of probes traditionally use with such instruments. Ophthalmological instruments utilizing such probes and methods of use. Biological protection of eye during use of such instruments.

Abstract: Transducer probes for ophthalmological instruments operating without the use of light (such as contact tonometers and ultrasound pachymeters)—whether structured substantially monolithically (as one piece) or in a hybrid or composite fashion (and, therefore, reversibly separable into constituent components)—the axially-located front transducer surface of which is surrounded by a ridge of material not representing the surface of the transducer, in which the overall front cornea-contacting surface of which is inwardly shaped to reduce or even completely avoid measurement errors associated with the use of conventionally-structured versions of probes traditionally use with such instruments. Ophthalmological instruments utilizing such probes and methods of use. Biological protection of eye during use of such instruments.

Abstract: A disposable biocompatible (and preferably hypoallergenic) flexible cover for use with a tip of a probe of a contact ophthalmological instrument. The outer surface of the tip (at the closed end) of the cover is configured to match the surface of the cornea, while its inner surface is preferably dimensioned to be substantially congruent with the surface of the tip of the probe with which the cover is used. A method for use of the same.

Abstract: 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.

Abstract: 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.

Abstract: A device including a contact tonometer tip having a bi-curved cornea-contacting surface structured to reduce, during the tonometric measurement, at least the measurement error caused by the presence of a fluid film between the tip and the cornea and/or the intra-corneal stress formed during the applanation deformation and occurring at a location of the tip-to-cornea contact area. Method for using such device for measurement of intraocular pressure while procuring values IOP with increased accuracy as compared to those obtained with the use of a conventional flat-surface tonometer tip. The cornea-contacting surface includes a first central portion and a second portion that encircles and adjoins the first central portion. The curvatures of the first and second portions have opposite signs. In one case, the first central portion has a curvature with the same sign as that of the cornea and/or is rotationally-symmetric.

Abstract: 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.