Self-illuminated handheld lens for retinal examination and photography and related method thereof

Patent metadata

Field	Value
Publication number	US-10426330-B2
Application number	US-201815869715-A
Country	US
Kind code	B2
Filing date	Jan 12, 2018
Priority date	May 6, 2009
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

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 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.

First claim

What is claimed is:

1. A self-illuminated handheld lens for wide angle retinal viewing of a subject eye, comprising:
an aspherical viewing lens having a symmetric viewing axis and defining a central aperture;
plurality of LEDs positioned around said viewing axis and configured to emit light to illuminate said subject eye;
an electronic controller powering said plurality of LEDs and controlling each individual LED or a series of LEDs independently; and
a light baffle configured to block stray light of said plurality of LEDs from getting into said central aperture.

2. The self-illuminated handheld lens of claim 1 , further comprising:
a contact lens positioned in front of said aspherical viewing lens to be applied to said subject eye.

3. The self-illuminated handheld lens of claim 1 , wherein said aspherical viewing lens has a field of view in the range of at least 120 degrees and less than or equal to 165 degrees on said retina.

4. The self-illuminated handheld lens of claim 1 , wherein said aspherical viewing lens has a field of view defined in the range of greater than 75 degrees and less than or equal to 165 degrees on said retina.

5. The self-illuminated handheld lens of claim 1 wherein said plurality of LEDs are each a high brightness, surface mounted white light LED.

6. The self-illuminated handheld lens of claim 1 , further comprising an optical diffuser incorporated between said plurality of LEDs and said central aperture of said aspherical viewing lens.

Assignees

• Univ Virginia Patent Foundation

Inventors

• Yates Paul Andrew

Classifications

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• H04N23/50

  Constructional details · CPC title

• H04N23/56

  provided with illuminating means · CPC title

• A61B3/14

  Arrangements specially adapted for eye photography · CPC title

• A61B3/0008 Primary

  provided with illuminating means (A61B3/117, A61B3/14 take precedence) · CPC title