Digital documenting ophthalmoscope

• US 7,364,297 B2
• Filed: 10/28/2004
• Issued: 04/29/2008
• Est. Priority Date: 10/28/2003
• Status: Expired due to Fees

• Current Assignee: Welch Allyn Incorporated
• Original Assignee: Welch Allyn Incorporated
• Inventors: McMahon, Michael, Salvati, Jon, Wawro, Marcia, Goldfain, Ervin, Fallat, David
• Primary Examiner(s): Mack; Ricky
• Assistant Examiner(s): MARTINEZ, JOSEPH P
• Application Number:
  US10/976,029
• Publication Number:
  US 20050110949A1
• Time in Patent Office: 1,279 Days
• Field of Search: 351/205, 351/206, 351/218, 396/18, 600/452, 606/4
• US Class Current: 351/206
• CPC Class Codes: A61B 3/158 of corneal reflection

Abstract

The invention is an eye viewing device having an eyepiece at an observer end thereof and an imaging element at an observation port thereof. Light that is reflected from an imaged eye of a patient is provided to either or both of the eyepiece and the imaging element. A practitioner can view the imaged eye, and can sequentially image the same region of the imaged eye for recording, documentation, and/or analysis.

Claims

1. A hand held digital documenting ophthalmoscope, comprising:

an illumination module for providing continuous, convergent illumination;

an optical module configured to direct at least a portion of said illumination to an eye and to communicate return illumination from said eye through an undilated pupil of said eye, said at least a portion of said illumination directed toward said eye having an intensity below a safety limit, said optical module comprising a Maxwellian view system;

a viewing module having an eyepiece configured to provide a true color live view to an operator of at least a portion of said eye using said return illumination;

an electronic imager module having an imager for capturing an image of at least a portion of said eye using said return illumination;

a mirror having a first state to provide said true color live view of at least a portion of the eye and a second state to provide said image of at least a portion of said eye;

an illumination control apparatus configured to direct said return illumination from said eye in part to said viewing module and in part to said electronic imager module wherein said illumination control apparatus is configured to control in serial temporal fashion said return illumination directed in part to said viewing module and in part to said electronic imager module, such that direct viewing occurs during a first time interval and electronic imaging occurs during a second time interval, wherein said first and second time intervals do not substantially overlap and in which an integration time of said electronic imager module is selectively adjustable; and

a dot plate glare removal apparatus.

2. The digital documenting ophthalmoscope of claim 1, wherein said illumination control apparatus is a selected one of a mirror and a shutter.

3. The digital documenting ophthalmoscope of claim 2, wherein said mirror is a selected one of a movable mirror and an electronically controllable mirror.

4. The digital ophthalmoscope of claim 1, wherein an integration time interval of said electronic imager module is adjusted to be different than that of the viewing time interval.

5. The digital documenting ophthalmoscope of claim 1, wherein said dot plate glare removal apparatus includes a polarizer and a dot plate.

6. The digital documenting ophthalmoscope of claim 1, wherein a field of view of at least 10 degrees is accessible for a selected one of a true color live view and an electronic image.

7. The digital documenting ophthalmoscope of claim 1, wherein at least one of said illumination module and said optical module comprise a reconfigurable illumination system wherein an illumination angle is adjustable.

8. A method of obtaining information about at least a portion of an eye of a patient, comprising the steps of:

providing a hand held digital documenting ophthalmoscope, said hand held digital documenting ophthalmoscope comprising;

an illumination module for providing continuous, convergent illumination;

an optical module configured to direct at least a portion of said illumination to an eye and to communicate return illumination from said eye through an undilated pupil of said eye, said at least a portion of said illumination directed toward said eye having an intensity below a safety limit, said optical module comprising a Maxwellian view system;

a viewing module having an eyepiece configured to provide a live view by an operator of at least a portion of said eye using said return illumination, said live view being a true color live view suitable for diagnosis;

an electronic imager module having an imager for capturing an image of at least a portion of said eye using said return illumination;

a dot plate glare removal apparatus; and

a mirror having a first state to provide said true color live view of at least a portion of the eye and a second state to provide said image of at least a portion of said eye;

illuminating at least a portion of said eye with illumination from said illumination module, said illumination passing through said optical module in at least one direction;

controlling said state of said mirror; and

depending on said state of said mirror, providing a selected one of a true color live view of at least a portion of said eye and an image of at least a portion of said eye;

whereby information about at least a portion of said eye is obtained, said method further comprising the step of directing said return illumination from said eye in part to said viewing module and in part to said electronic imager module wherein the step of directing said return illumination from said eye in part to said viewing module and in part to said electronic imager module comprises providing a direct view during a first time interval and providing electronic imaging during a second time interval, wherein said first and second time intervals do not substantially overlap, said method further comprising the step of selectively adjusting an integration time of said electronic imager module.

9. The method of claim 8, further comprising the step of removing glare from a selected one of said true color live view of said portion of said eye and said image of said portion of said eye.

10. A hand held digital documenting ophthalmoscope, comprising:

an illumination module for providing continuous, convergent illumination;

an optical module configured to direct at least a portion of said illumination to an eye and to communicate return illumination from said eye through an undilated pupil of said eye, said at least a portion of said illumination directed toward said eye having an intensity below a safety limit, said optical module comprising a Maxwellian view system;

a viewing module having am eyepiece configured to provide a true color live view to an operator of at least a portion of said eye using said return illumination;

an electronic imager module having an imager for capturing an image of at least a portion of said eye using said return illumination;

a mirror having a first state to provide said true color live view of at least a portion of the eye and a second state to provide said image of at least a portion of said eye; and

a dot plate glare removal apparatus for removing glare from a selected one of said true color live view of said portion of said eye and said image of said portion of said eye.

11. The digital documenting ophthalmoscope of claim 10, wherein said dot plate glare apparatus includes at least one polarizer and a dot plate.

12. A hand held digital documenting ophthalmoscope, comprising:

an optical module configured to direct at least a portion of said illumination to an eye and to communicate return illumination from said eye through an undilated pupil of said eye, said at least a portion of said illumination directed toward said eye having an intensity below a safety limit, said optical module comprising a Maxwellian view system;

a viewing module having an eyepiece configured to provide a true color live view to an operator of at least a portion of said eye using said return illumination;

an electronic imager module having an imager for capturing an image of at least a portion of said eye using said return illumination; and

a mirror having a first state to provide said true color live view of at least a portion of the eye and a second state to provide said image of at least a portion of said eye wherein at least one of said illumination module and said optical module comprise a reconfigurable illumination system wherein an illumination angle is adjustable through interposition of at least one replaceable lens module of said system.

13. A method of obtaining information about at least a portion of an eye of a patient, comprising the steps of:

providing a hand held digital documenting ophthalmoscope, said hand held digital documenting ophthalmoscope comprising;

an illumination module for providing continuous, convergent illumination;

an optical module configured to direct at least a portion of said illumination to an eye and to communicate return illumination from said eye through an undilated pupil of said eye, said at least a portion of said illumination directed toward said eye having an intensity below a safety limit, said optical module comprising a Maxwellian view system;

a viewing module having an eyepiece configured to provide a live view by an operator of at least a portion of said eye using said return illumination, said live view being a true color live view suitable for diagnosis;

an electronic imager module having an imager for capturing an image of at least a portion of said eye using said return illumination; and

a mirror having a first state to provide said true color live view of at least a portion of the eye and a second state to provide said image of at least a portion of said eye;

illuminating at least a portion of said eye with illumination from said illumination module, said illumination passing through said optical module in at least one direction;

controlling said state of said mirror; and

depending on said state of said mirror, providing a selected one of a true color live view of at least a portion of said eye and an image of at least a portion of said eye;

whereby information about at least a portion of said eye is obtained and in which at least one of said illumination module and said optical module comprise a reconfigurable illumination system wherein an illumination angle is adjustable by interposing at least one replaceable lens module.