Expansion ring for eyeball tissue

An expansion device for dilating an iris, the expansion device comprising:

• a resilient strand including a first end and a second end, wherein the first end is coupled to the second end to form a geometric figure having multiple adjacent sides of equal length, the multiple adjacent sides forming a perimeter having an interior and an exterior and providing a substantially planar opening for access through the pupil,
• wherein each adjacent side of the multiple adjacent sides is joined to another adjacent side of the multiple adjacent sides by a corner portion, the corner portion including a top section, a bottom section, and a connecting section,
• wherein the top section and the bottom section of each corner portion form a gap therebetween along the exterior of the perimeter in a direction orthogonal to the plane of the opening, and
• wherein each gap is configured to receive iris tissue.

A device for holding an iris open for access through the pupil, the device comprising:

• a plurality of elongated sides, wherein each side has a first end and a second end;
• a plurality of tissue-engaging corners, each tissue engaging corner:
• joining a second end of an elongated side of the plurality of elongated sides to a first end of another elongated side of the plurality of elongated sides to form a continuous ring of resilient material providing a substantially planar opening for the access through the pupil, in which the ring has a square shape or a triangular shape, and
• wherein each tissue-engaging corner comprises a top section, a bottom section, and a connecting section extending between the top section to the bottom section, wherein the top section, the connecting section and the bottom section form a gap therebetween in a direction transverse to a length dimension of one of the elongated sides and orthogonal to the plane of the opening, and wherein at least one of the top section, the connecting section or the bottom section is configured to engage iris tissue received in the gap.

An expansion device for dilating an iris, the expansion device comprising:

• a resilient strand including a first end and a second end, wherein the first end is coupled to the second end to form a square shape or triangular shape having multiple adjacent sides, the multiple adjacent sides forming a perimeter having an interior and an exterior and providing a substantially planar opening for the access through the pupil,
• wherein each adjacent side of the multiple adjacent sides is joined to another adjacent side of the multiple adjacent sides by a corner portion, each corner portion including a top section, a bottom section, and a connecting section,
• wherein the top section and the bottom section of each corner portion form a therebetween gap along the exterior of the perimeter in a direction orthogonal to the plane of the opening, and
• wherein each gap is configured to receive iris tissue.