WBT Technical Overview The veracity of the cornea in

biometrics  

Stephen  Archer  Mason  B  Optom  (UNSW)  FAAO    

Corneal reflections are unique to each eye  

•  Christoph Scheiner, a Jesuit priest of the 16th and 17th century, was the first to measure the natural contour of the human cornea (Christoph Scheiner, 1575-1650; 'Oculus, hoc est fundamentum opticum' (Innsbruck 1619) );

•  Corneal contour impacts on fitting

contact lenses, prescribing glasses and in laser refractive surgery to correct vision (LASIK)

•  The accuracy of contour

measurement has become precise with 21st Century digital imaging

Clinical Origins  

•  Corneal topography captures eye images and produces contour maps of the front surface, the cornea

Corneal Topographic Maps provide a simulated 3D presentation of corneal shape: two client eyes imaged below from different subjects- colour designates contour, or shape. No two eyes are identical, even right vs left of the same subject.

Wavefronts ‘Corneal Specular Reflex

Authentication’ (CSRA) derived from Corneal Topography    

•  WBT’s patented technology to authenticate identity from the surface of the cornea; early prototype proof of concept device imaged at right from 2007

•  Small datasets for each client

results in high data transfer speeds locally or intranet/internet

•  Authentication not limited by

hardware; identity can be confirmed on the client (locally) or server side (remotely)

Corneal contour is a rich source of biometric data  •  With corneal topography, up to 9000 individual datapoints to create a

dataset (Medmont E300) from the corneal Purkinje Image (or first Purkinje image)

•  Mason’s research used ‘smoothed’ data of 1000 datapoints subject to the available surface area of the cornea imaged (less for narrow eyes, more for wide eyes).

•  Mason’s analysis was supported by Professor Schwiegerling, University of Arizona, confirming no interpolation of personal datasets on a one: many comparison for corneal topography as a means to authenticate identity.

•  WBT is working with research experts in the field (Prof Stephen Elliott, University of Purdue, Indiana) to support this analysis and extend as a multi-modal method to include iris and other biometric eye data.

Quote from Third Party Validation of Corneal Topograph:  

 Prof.  Jim  Schwiegerling,  University  of  Arizona.  

Other Research  

•  The graph is from Lewis’ PhD thesis (2011), a student of Prof. Schwiegerling, using corneal topography to authenticate identity (single modal) Best at FAR 3.5% and FRR 3.5%

Phase 1 and 2 Prototype  

•  First multi-modal white-light-color-plane analysis of iris and corneal biometrics for authentication of identity on planet Earth.

•  Now at end of Phase 2 of 3 planned phases

•  Phase 3 to produce a market-ready technology.