Self-illuminated handheld lens for retinal examination and photography and related method thereof
AssigneeUniversity of Virginia Patent Foundation
InventorPaul Andrew Yates
Life of this patent
Estimating the term…
Abstract
System and method directed towards providing full and even illumination of a patient's retina through lighting integrated into a handheld fundus lens. By integrating the lighting, the method and system reduces and even eliminate many lens artifacts and reflections. By increasing the accuracy, quality, and field of view 10 afforded during clinical examination of the retina, the method and system will allow practitioners to make more accurate diagnoses and will increase safety during retinal surgical procedures.
Claims10
A self-illuminated handheld lens for wide angle retinal viewing of a subject eye, comprising:
- an aspherical objective lens having a symmetric viewing axis and defining a viewing channel;
- a contact lens positioned in front of said aspherical objective lens to be applied to said subject eye;
- plurality of LEDs positioned around said viewing axis and configured to illuminate said subject eye outside from said viewing channel;
- a light baffle configured to block stray light of said LEDs from getting into said viewing channel;
- and
- cross polarization means incorporated between said plurality of LEDs and said viewing channel of said aspherical objective lens, wherein said cross polarization means comprises a first polarizer attached to cover said LEDs and a second polarizer positioned in said viewing channel of said aspherical objective lens.
A wide field fundus camera for taking wide field of view retina image of a subject eye, comprising:
- a self-illuminated handheld lens incorporated plurality of LEDs and positioned to form a retinal image with a wide field of view, wherein said wide field of view is defined as greater than 75 degrees;
- a digital camera disposed to capture said retinal image;
- and
- an electronic controller configured to power said plurality of LEDs.
Dependencies are inferred from the claim text.