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

Patent metadata

Field	Value
Publication number	US-10426340-B2
Application number	US-201715794407-A
Country	US
Kind code	B2
Filing date	Oct 26, 2017
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 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.

First claim

What is claimed is:

1. 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;
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;
a light baffle configured to block stray light of said plurality of 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 to polarize said light emitted from said plurality of LEDs and a second polarizer positioned in said viewing channel of said aspherical objective lens.

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

3. The self-illuminated handheld lens of claim 2 , wherein said contact lens has a diameter approximate 10 mm.

4. The self-illuminated handheld lens of claim 1 , wherein said aspherical objective lens has a field of view of 120 degrees or wider 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 , wherein said light baffle is made of black outside said viewing channel.

Assignees

• Univ Virginia Patent Foundation
• Univ Of Virginia Patnet Foundation

Inventors

• Yates Paul Andrew

Classifications

• H04N23/56

  provided with illuminating means · CPC title

• H04N23/55

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

• A61B3/156 Primary

  for blocking · CPC title

• A61B3/0008

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

• A61B3/14

  Arrangements specially adapted for eye photography · CPC title