Ynjiun Paul Wang, Ervin Goldfain, Eric G Petersen: Ophthalmoscope device. Welch Allyn, Merchant & Gould P C, January 19, 2016: US09237847

An ophthalmoscope device includes a support structure, an image capture device, and a display device. The support structure is configured to be worn by a subject. The image capture device is configured to capture images of the eye fundus of the subject. The display device is configured to overlay im ...

Eric M Andreassen, David M Fallat, Ervin Goldfain, John R Strom, John T Delaney, Howard Haines, Corinn C Fahrenkrug, Cynthia A Kuiper: Digital otoscope. Welch Allyn, Barclay Damon, October 25, 2016: US09474441

An otoscope includes an instrument head, a tip element and an optical system. The instrument head has a distal insertion portion for insertion into an ear of a human or veterinary subject. The distal insertion portion has a distal opening. The tip element is releasably attached to the distal inserti ...


Ervin Goldfain, Raymond A Lia: Method and apparatus for analyzing subsurfaces of a target material. WELCH ALLYN, Guntin & Gust, Robert Gingher, May 24, 2016: US09345407

A system that incorporates teachings of the present disclosure may include, for example, a method for aligning first and second light signals on an optical path directed to a target, where the first light signal provides a visualization of the target, and a portion of the second light signal reflect ...

Robert J Wood, Jon R Salvati, Michael Curry, Christopher Dickens, Ervin Goldfain: Examination light apparatus with touch-less control. Welch Allyn, Hiscock & Barclay, August 26, 2014: US08816599

An examination light apparatus including a touch-less control component that enables a user to control the apparatus without requiring physical contact between the user and the apparatus. The apparatus employs an LED control component that is configured to adapt its electrical interface to a variabl ...


Ervin Goldfain, William Legerway, Chris R Roberts: Eye viewing device for retinal viewing through undilated pupil. Welch Allyn, yu gang, December 26, 2001: CN99813584

The invention is a low cost, low input power eye viewing device well suited for viewing wide field retinal images through an undilated pupil. Included in the device are a converging light illumination system and an aperture stop. The converging light illumination system provides ease of entry of lig ...

Ervin Goldfain, Allan I Krauter, Chris R Roberts, Steven R Slawson, William H Lagerway: Eye viewing device comprising eyepiece and video capture optics. Wall Marjama & Bilinski, June 24, 2004: US20040119941-A1

The invention is an eye viewing device having a module holder formed at an observer end thereof. Replaceably received in the holder is a viewing module. The viewing module may comprise eyepiece optics, image signal generating elements, or combined eyepiece and image signal generating elements.

Ervin Goldfain, Steven R Slawson, Eric M Andreassen, Cynthia A Kuiper, Elizabeth P Staples, Raymond A Lia: Otoscope. Welch Allyn, Wall Marjama & Bilinski, February 3, 2005: US20050027169-A1

An otoscope permitting examination of a patient's ear is defined by an instrument head including a proximal end and a distal insertion portion that is insertable into the ear. The otoscope includes an imaging lens train disposed within the instrument head, wherein each of the imaging lens train, an ...

Corinn C Fahrenkrug, Chris R Roberts, Raymond A Lia, Ervin Goldfain, Jeffrey Perkins, Allan I Krauter, Andrew J Kugler: Apparatus and method for determining intraocular pressure and corneal thickness. Welch Allyn, Wall Marjama & Bilinski, February 10, 2005: US20050030473-A1

The invention includes methods and apparatus for measuring (Intraocular Pressure) IOP and (Corneal Thickness) CT for diagnosis and for monitoring a condition of health of an eye. The apparatus uses measurements selected from at least one of IOP and a CT, and a plurality of IOP measurements to deduce ...

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