Non-contacting tonometer

Details Non-contacting tonometer Non-contacting tonometer

2007-04-10

2007-04-10

Hindenburg, Max F. (Department: 3736)

Surgery

Diagnostic testing

Testing aqueous humor pressure or related condition

Reexamination Certificate

active

10400688

ABSTRACT:
Apparatus and method for measuring Internal Ocular Pressure (IOP) comprises applying a perturbing vibration into an eye over a range of frequencies. A vibrational response of the surface of the eye is measured such as by using a laser velocimeter, the vibrational response including velocity and rate of change of the phase lag. Further, geometric properties such as volume of the eye are measured such as by using a laser interferometer to measure characteristics such as the eye's axial length and cornea thickness. Use of multiple characteristics normalizes the effect of an eye's mechanical and geometric properties and thereby more accurately determines the IOP.

REFERENCES:
patent: 2519681 (1950-04-01), Mages
patent: 3049001 (1962-08-01), Mackay et al.
patent: 3070087 (1962-12-01), Sittel
patent: 3181351 (1965-05-01), Stauffer
patent: 3192765 (1965-07-01), Keiper
patent: 4646754 (1987-03-01), Seale
patent: RE34663 (1994-07-01), Seale
patent: 5565939 (1996-10-01), Fujieda
patent: 6053867 (2000-04-01), Iijima
patent: 6288784 (2001-09-01), Hitzenberger et al.
patent: 6423001 (2002-07-01), Abreu
patent: 6673014 (2004-01-01), Badehi et al.
patent: 2002/0173711 (2002-11-01), Walton
Roos, P.A. et. al. “Laser vibrometer based on optical-feeedback-induced frequency modulation of a single mode laser diode”□□Applied Optics, Dec. 1996. vol. 35, No. 34.
Valera, J. D. et. al. “Combined fibre optic laser velocimeter and electronic speckle pattern interferometer with a common reference beam.”□□Measurement Science and Technology, 1993. vol. 4, pp. 578-582.
www.photonics.com/Spectra/NewProds/oct99/tDOPPLER.html, Mar. 19, 2002, 2 pages.
www.imageautomatioan.com/ometron/faq.html, Mar. 25, 2002, 10 pages.
OMETRON VH300+ technical specifications, 1 page.
OMETRON VS100/VS1000 Single-Point Laser Doppler Vibrometer technical literature, 4 pages.
www.findarticles.com/cf—dls/g2601/0005/2601000595/p1article—ihtml, Mar. 19, 2002, 2 pages.
www.ascrs.org/publications/jcrs/lsmay00.htm, Mar. 19, 2002, 2 pages.
www.venus.co.uk/iga/SimpFact/sf096.htm, Mar. 19, 2002, 2 pages.
http://willsglaucoma.org/terminology.html, Mar. 19, 2002, 3 pages.
www.cdi.pub.ro/CDI/Medical/disc7/sld017.htm, Mar. 19, 2002, 1 page.
http://research.opt.indiana.edu/Libraray/InterferometricMeas/InterferometricMeas.html, Mar. 18, 2002, 16 pages.
www.usa.canon.com/indtech/encoders/lv20z.html, Mar. 25, 2002, 1 page.
www.usa.canon.com/indtech/encoders/lv20zspec.html, Mar. 25, 2002, 1 page.
Young, W. Jr., Meyers, J., and Hoad, D., A Laser Velocimeter Flow Survey Above a Stalled Wing, 1978, 4 pages (title page, pp. 41-43), NASA Technical Paper 1266.
Meyers, J. and Murphy, R., Frequency Domain Laser Velocimeter Signal Processor, Nov. 27-28, 1990, 5 pages (title, 1, 2, 11, and 12), Technology 2000 National Aeronautics and Space Administration.
www.lerc.nasa.gov/Other—Groups/OptInstr/Idv.html, Mar. 18, 2002, 1 page.
www.mne.umassd.edu/facilities/laserlab.html, Mar. 18, 2002, 1 page.
www.spie.org/web/meetings/calls/pw98/pw98call—bo04.html, Mar. 18, 2002, 3 pages.
www.opt.indiana.edu/riley/HomePage/NonContact/TEXT—Non—Contact.html, Mar. 18, 2002, 5 pages.
www.analytic-web.com/polytec-com/1—vib/vib—uni—las.html, Mar. 20, 2003, 3 pages.
www.analytic-web.com/polytec-com/1—vib/vib—uni—vib.html, Mar. 20, 2003, 5 pages.
http://archopht.ama-assn.org/issues/v118n1/abs/ecs90061.html, Mar. 18, 2002, 2 pages.

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