Patient interface device for laser methods and systems
An optical interface device having an opening for an optical path that can be non-circular and having engagement members having gradually varying angles of engagement. An embodiment of the interface device can be a one size fits all device, providing a configuration that fits in all typical eye openings, including narrow palpebral fissures and small eyes, while providing optical path access to features and structures of the eye. An embodiment of the interface device engages the limbus, cornea and sclera.
1 . An interface device for fixing on a human eye and operably connecting to an ophthalmic therapeutic, monitoring, diagnostic, or evaluative device, the interface device comprising:
a. a body having an upper and a lower section, wherein the lower section defines a distal end of the interface device for contacting a surface of the eye and the upper section defines a proximal end of the interface device; whereby the proximal and distal ends define a device height along a vertical axis of the device;
b. the lower section of the body defining an outer shape;
c. the upper and lower sections of the body defining an opening through the device;
d. the device having a major and a minor axis, wherein when in use the major axis corresponds to a nasal temporal axis;
e. the lower section having an inner contact member surrounded by an outer contact member; the contact members each having a distal end; wherein the distal ends of the contact members form the distal end of the device; wherein the inner contact member defines an elliptical opening having a major and a minor axis; whereby the elliptical opening is an ellipse;
f. the inner contact member having a height, and the outer contact member having a height; and,
g. wherein the height of the inner contact member varies between a point intersecting the major axis and a point intersecting the minor axis.
2 . The device of claim 1 , wherein the major axis of the opening at the distal end of the device is from about 1.01 to about 1.2 times larger than the minor axis.
3 . The device of claim 1 , wherein the major axis of the opening at the distal end of the device is from about 1.08 to about 1.21 times larger than the minor axis.
4 . The device of claim 1 , wherein the major axis of the opening at the distal end of the device is from about 1.15 to about 1.19 times larger than the minor axis.
5 . The devices of claim 1, 2, 3, or 4 , wherein the distal end of the inner contact member is shorter at the minor axis and taller at the major axis.
6 . The devices of claim 1, 2, 3, or 4 , wherein the distal end of the outer contact member is shorter at the minor axis and taller at the major axis.
7 . The devices of claim 1, 2, 3, or 4 , wherein the distal end of the inner contact member defines a shape of a non-planar ellipse.
8 . The devices of claim 1, 2, 3, or 4 , wherein the distal end of the outer contact member defines a shape of a non-planar ellipse.
9 . The devices of claim 1, 2, 3, or 4 , wherein the distal end of the inner contact member and the distal end of the outer contact member define a shape of a non-planar ellipse.
10 . The devices of claim 1, 2, 3, or 4 , wherein the inner contact member defines a contact member angle of greater than 90°.
11 . The devices of claim 1, 2, 3, or 4 , wherein the outer contact member defines a contact member angle of less than 90°.
12 . The device of claim 1 , comprising a window over the opening.
13 . The device of claim 12 , wherein the window is a curved window.
14 . The device of claim 13 , wherein the window is a contact lens.
15 . The device of claim 13 , wherein the curved window is configured so that when in use the curved window contacts the surface of the eye and changes the shape of the eye.
16 . The device of claim 1 , comprising a planar applanation window.
17 . The device of claim 1 , wherein the inner contact member is configured so that when in use the inner contact member contacts a sclera of the eye, and does not contact a limbus of the eye along the major axis.
18 . The device of claim 1 , wherein the inner contact member is configured so that when in use the inner member contacts the limbus at the minor axis.
19 . The device of claim 1 , wherein the opening is larger than a typical human iris, and thereby the device does not obstruct the iris.
20 . An interface device for fixing on a human eye and operably connecting to an ophthalmic therapeutic, monitoring, diagnostic, or evaluative device, the interface device comprising:
a. a body having an upper and a lower section, wherein the lower section defines a distal end of the interface device for contacting a surface of the eye and the upper section defines a proximal end of the interface device; whereby the proximal and distal ends define a device height along a vertical axis of the device;
b. the lower section of the body comprising a ridged annular channel;
c. the ridged annular channel containing and holding a flexible insert; the flexible insert comprising an inner contact member surrounded by an outer contact member; and forming a flexible annular zone for maintaining a reduced pressure when engaged with a surface of the eye;
d. the upper and lower sections of the body defining an opening through the device;
e. the device having a major and a minor axis, wherein when in use the major axis corresponds to a nasal temporal axis; wherein the distal end of the device defines a shape of a non-planar ellipse; wherein the inner contact member defines an elliptical opening having a major and a minor axis; whereby the elliptical opening is an ellipse; and,
f. wherein the major axis of the opening at a distal end of the inner contact member is from about 1.01 to about 1.25 times larger than the minor axis.
21 . The device of claim 20 , wherein the major axis of the opening at the distal end of the device is from about 1.15 to about 1.2 times larger than the minor axis.
22 . The device of claim 20 , wherein the major axis of the opening at the distal end of the device is from about 1.1 to about 1.2 times larger than the minor axis.
23 . The device of claim 20 , wherein the major axis of the opening at the distal end of the device is from about 1.16 to about 1.19 times larger than the minor axis.
24 . The device of claim 20 , wherein the distal end of the inner contact member is shorter at the minor axis and taller at the major axis.
25 . The device of claim 20 , wherein the distal end of the outer contact member is shorter at the minor axis and taller at the major axis.
26 . The device of claim 20 , wherein the inner contact member defines a contact member angle of greater than 90°.
27 . The device of claim 20 , wherein the outer contact member defines a contact member angle of less than 90°.
28 . The device of claim 20 , comprising a window over the opening.
29 . The device of claim 28 , wherein the window is a curved window.
30 . The device of claim 29 , wherein the window is a contact lens.
31 . The device of claim 29 , wherein the curved window is configured for contact on the surface of the eye and configured to change the shape of the eye.
32 . The device of claim 20 , comprising a planar applanation window.
33 . The device of claim 20 , wherein the inner contact member is configured so that when in use the inner contact member contacts a sclera of the eye, and does not contact a limbus of the eye along the major axis.
34 . The device of claim 20 , wherein the inner contact member is configured so that when in use the inner member contacts the limbus at the minor axis.
35 . The device of claim 20 , wherein the opening is larger than a typical human iris, and thereby the device does not obstruct the iris.