Multi-piece intraocular lens assembly and method of manufacturing same

A multi-piece intraocular lens, said multi-piece intraocular lens comprising:

• a. an optic having an optical axis and a peripheral edge, said optic peripheral edge having a first region with “n” first small inlet recesses and a second region opposite to said first region, said second region having “n” second small inlet recesses, each of said “n” first and second small inlet recesses having a general keyhole shape, the number “n” being selected from a group of numbers consisting of 1, 2 and 3;
• b. a first haptic having an optic attachment region with “n” small projections shaped and located to dovetail into said optic “n” first small inlet recesses;
• and
• c. a second haptic having an optic attachment region with “n” projections shaped and located to dovetail into said optic “n” second small inlet recesses.

A method of constructing a multi-piece intraocular lens, said method comprising the steps of:

• a. forming an optic of one material with a small inlet recess in a peripheral edge region;
• b. forming a positioning haptic of a different material with a small protrusion extending from an optic attachment region, said protrusion matching the shape of said optic small inlet recess;
• and
• c. inserting said haptic protrusion into said optic inlet recess through one of an optic anterior surface, an optic posterior surface and an optic peripheral edge so as to interlock the haptic and optic together.

A method of constructing a multi-piece intraocular lens, said method comprising the steps of:

• a. forming an optic of an elastomeric plastic material with a plurality of like small inlet recesses in each of two opposite peripheral edge regions;
• b. forming first and second positioning haptics of a hard plastic material each with a plurality of small protrusions extending from an optic attachment region, said plurality of protrusions matching the shape and location of said optic small inlet recesses;
• c. inserting said first haptic plurality of small protrusions into the plurality of optic small inlet recesses in one optic peripheral edge region and said second haptic plurality of small protrusions into the plurality of optic small inlet recesses in the opposite optic peripheral edge region so as to dovetail interlock the haptics and optic together;
• and
• d. cementing said plurality of protrusions of said first and second haptics into corresponding pluralities of inlet recesses in said optic to form a composite, multi-piece intraocular lens.

A method of constructing a multi-piece intraocular lens, said method comprising the steps of:

• a. forming a first modified blank of one material to be used for haptic fabrication with a central optic cut-out leaving at least one small protrusion for haptic to optic attachment;
• b. forming a second modified blank of another material to be used for optic fabrication with at least one peripheral edge small inlet recess at a location corresponding to a location of the protrusion in said first modified blank and matching the shape of said protrusion;
• c. assembling said first and second modified blanks into an interlocking, dual-material blank with said haptic small protrusion dovetailed into said optic small inlet recess;
• and
• d. fabricating a composite, multi-piece IOL from said dual-material blank by forming a haptic in said first modified blank.

A method of constructing a multi-piece intraocular lens, said method comprising the steps of:

• a. forming a first modified blank of one material to be used for haptic fabrication with a central optic cut-out leaving at least one small dovetail inlet recess in each of opposite peripheral optic cut-out regions for haptic to optic attachment;
• b. forming a second modified blank of another material to be used for optic fabrication with at least one peripheral edge small protrusion in each of opposite peripheral edge regions at locations corresponding to location of the haptic inlet recesses in the first modified blank and matching the shape of said inlet recesses;
• c. assembling said first and second modified blanks into a composite, dual-material blank with said optic protrusions interlockingly dovetailed and cemented into corresponding ones of said haptic inlet recesses;
• and
• d. fabricating a composite, multi-piece IOL from said dual-material blank by forming first and second haptics in said first modified blank, including cementing the optic protrusions into the haptic inlet recesses.

A method of constructing a multi-piece intraocular lens, said method comprising the steps of:

• a. forming a haptic from a first material, with at least one small inlet recess in an edge of said haptic;
• b. forming an optic from a second material, with at least one peripheral edge small protuberance at a peripheral edge region, said at least one protuberance matching the at least one haptic small inlet recesses in shape, number and position;
• and
• c. dovetailing and cementing said at least one optic protrusion into said at least one haptic inlet recess so as to provide a multi-piece intraocular lens.