Ergonomic frames for telescopic loupes

Details Ergonomic frames for telescopic loupes Ergonomic frames for telescopic loupes

2002-05-20

2003-02-04

Mai, Huy (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Combined

C359S481000

Reexamination Certificate

active

06513929

ABSTRACT:

FIELD OF THE INVENTION
This invention relates generally to magnification eyewear and, in particular to improved eyeglass frames particularly for physicians, surgeons and other medical professionals.
BACKGROUND OF THE INVENTION
Many clinical procedures require a large declination angle, which is defined as the angle that a person's eyes makes to the horizon when looking down. Accommodating a large declination angle in conjunction with through-the-lens surgical telescopes is often very limited due to the physical constraints of the eyeglasses. In particular, the typical pantascoptic angle, which is defined as the angle between the temple and the plane of the lenses, is generally at or near 90 degrees, which makes the mounting of through-the-lens loupes at a high declination angle problematic.
This situation is depicted in
FIGS. 1 and 2
.
FIG. 1
depicts schematically a pair of eyeglasses at
100
, wherein a pantascoptic angle “p” is defined between a temple portion
102
and the plane of the lenses
104
as shown. The eyeball is shown at
106
, which lies on an optical axis
108
. As is typical, the angle “p” is very close to 90 degrees, often on the order of 80 degrees or more.
As shown in
FIG. 2
, when surgical telescopes
204
are physically bonded through a lower section of the glass or plastic comprising the lenses, this near 90 degree pantascoptic angle creates significant problems, often resulting in physical instability. In particular, when surgical telescope
204
is mounted/cemented through the lower portion of the lens
206
at a relatively large declination angle little, or no area
208
remains between the mounting and the bottom of the lens. This results in a narrow band of lens material which is very fragile, such that if the slightest force is received on the upper portion of the telescope
204
, breakage or dislodging of the assembly may occur.
SUMMARY OF THE INVENTION
This invention improves on the prior art by providing ergonomic eyeglass frames particularly suited to surgical, medical and dental applications. The invention includes a set of eyeglass frames having a temple portion and lenses arranged in a plane, whereby the angle between the temple portion and the lens plane defines a pantascoptic angle. A pair of surgical telescopes or loupes are mounted through a lower portion of one of the respective eyeglass frames, and the pantascoptic angle is preferably 80 degrees or less to provide a more stable physical mounting of the telescope or loupe through the lower portion of each lens element.


REFERENCES:
patent: 3273456 (1966-09-01), Feinbloom
patent: 3522983 (1970-08-01), Daniels
patent: 5428474 (1995-06-01), Murphy
patent: 6061189 (2000-05-01), Caplan et al.

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