Device to directly monitor intra ocular pressure by a person based on pattern and colour changes

• US 20110288396A1
• Filed: 02/01/2010
• Published: 11/24/2011
• Est. Priority Date: 01/30/2009
• Status: Active Grant

• Current Assignee: Ashwin Kumar Krishna Prasad, Panduranga Revankar Krishna Prasad, Sundaraja Sitaram Iyengar, Veneeth Iyengar
• Original Assignee: Ashwin Kumar Krishna Prasad, Panduranga Revankar Krishna Prasad, Sundaraja Sitaram Iyengar, Veneeth Iyengar
• Inventors: Prasad, Ashwin Kumar Krishna, Iyengar, Veneeth, Prasad, Panduranga Revankar Krishna, Iyengar, Sundaraja Sitaram
• Granted Patent: US 9,282,891 B2
• Time in Patent Office: Days
• US Class Current: 600/398
• CPC Class Codes: A61B 3/16 for measuring intraocular pressure, e.g. tonometers
• CPC Class Codes: A61F 2/14 Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
• CPC Class Codes: A61F 2/16 Intraocular lenses
• CPC Class Codes: A61F 9/0017 implantable in, or in contact with, the eye, e.g. ocular inserts
• CPC Class Codes: A61F 9/00781 Apparatus for modifying intraocular pressure, e.g. for glaucoma treatment drainage implants in general A61M27/002
• CPC Class Codes: A61K 9/0051 Ocular inserts, ocular implants

Abstract

A Device which enables a person to see for himself changes in Intra Ocular Pressure when he looks at his eye in the Mirror, in the routine course of everyday, as every one likes to see his Own face and eyes in the Mirror everyday. The device being Tiny and inserted surgically with minimum incision between Iris and Cornea, enables early indication of IOP in people with high risk of Glaucoma due to high blood pressure and genetic reasons and old age, the early indication enabling timely treatment before retinal damage. The device works on pattern changes due to pressure change which is compared with fixed background pattern and changes in spacing between lines of Diffraction grating and Hologram leading to colour changes due to interference effect of light. Mirror with an area of concave surface and Magnifying device along with comparison Chart enables proper monitoring of drug efficacy.

Claims

1. A device to monitor Intra Ocular Pressure by the person himself by looking at changes in patterns and colour of the device, in the mirror and through magnifying attachment, the device comprising of a rigid base with background pattern on which is attached an elastomer with counter pattern and pattern of hologram and diffraction grating of different spacing to give colour changes. A layer of biocompatible polymer encloses the whole structure. The devise helps Ophthalmologists to monitor efficacy and dosage of drugs given to control Intra Ocular Pressure.

2. The device as claimed in claim 1:

Wherein the devise is surgically inserted between the Cornea and Iris under aseptic condition through a small incision.

3. The device as claimed in claim 1:

Wherein pattern is one of Diffraction grating which changes in colour due to interference effect of light due to spacing of pattern changing on increasing pressure. The pattern which is one of a hologram gives changes in colour on change in pattern due to change in pressure. The background pattern on rigid base remains constant and serves to indicate changes in the pattern on the elastomer by comparison on superimposition.

4. The device as claimed in claim 1:

wherein the spacing of lines in the diffraction grating is different in different Areas so that the area of colour change indicates the level of pressure change. Where the spacing is more change of colour is seen first while area where the spacing between lines is less change of colour occurs at a much higher pressure, in one embodiment. The diffraction grating and Hologram is selected taking into account the Iris colour of the person.

A pattern giving unique identification of a person is added in one area.

5. The device as claimed in claim 1:

Wherein the pattern is one of that printed by micro lithography, by one of etching with laser of vapour depositions by sputtering and photo etching, and by one of embossing to give the hologram pattern and diffraction grating and background pattern with its counter pattern.

6. The device as claimed in claim 1:

Wherein a Gel is present between the Rigid base and the elastomer to enhance the sensitivity to pressure.

7. The device as claimed in claim 1:

wherein the Mirror has a portion with concave surface to magnify the image of the eye. A magnifier consisting of an objective convex lens assembly and a pair of mirrors in one embodiment and a pair of right angled prisms another embodiment and an eyepiece convex lens assembly with focusing screw is provided to enlarge the image of the devise for closer monitoring of changes in pattern. This magnifier is used to monitor other conditions of the eye.

8. The device as claimed in claim 1:

Wherein the magnetic strip is added to the rigid base to enable shifting and adjust the placement of the device using, a magnetic field. This helps in getting the proper viewing position. In case of Iris based Biometrics the devise position is changes to get full signature of Iris when needed.

9. The device as claimed in claim 1:

Wherein a Biocompatible polymer layer surrounds the entire devise to enhance safety. This layer has folds at corner to give flexibility to allow stretching of Elastomer layer.

10. The device as claimed in claim 1:

Wherein a comparison Chart with pattern change corresponding to different levels of pressure change is printed on the Mirror and also given as a separate chart.