Molds and method of using the same for forming plus or minus lenses

A disposable mold for forming an ophthalmic lens, the mold comprising:

• a substantially amorphous thermoplastic material forming an optically precise front mold;
• a substantially amorphous thermoplastic material forming a rear mold, wherein the rear mold includes a plurality of protrusions adjacent en edge of the rear mold, the plurality of protrusions having a height that establishes a thickness of a mold cavity between the front and rear molds;
• and
• a coating in contact with the optically precise front and rear molds, the coating configured to be incorporated into an ophthalmic lens and removable from the front and rear molds.

A method of fonning an ophthalmic lens, the method comprising:

• providing a substantially amorphous thermoplastic material injection molded to form both a front mold and a rear mold, each having an optically precise surface, wherein a selected one of the front mold or the rear mold includes a plurality of protrusions adjacent an edge of that mold, the plurality of protrusions having a height that establishes a thickness of a mold cavity between the front and rear molds;
• providing a first curable composition suitable for forming an ophthalmic lens, said first curable composition being unreactive or reactive with the amorphous thermoplastic material used to form the mold;
• providing a second curable composition, said second curable composition being compatible with the amorphous thermoplastic material used to form the mold,
• coating the optically precise surface of the lens mold with the second curable composition such that the second curable composition is in direct contact with the substantially amorphous thermoplastic material, and at least partially curing the second curable composition;
• subsequently forming a lens within the lens mold by applying the first curable coating composition over the second curable composition, and curing the first curable coating composition;
• and
• removing the cured lens from the mold such that the cured second curable composition is removed with the lens and is secured to the cured first curable composition.