Corrective Lens and Shield in Unitary Structure and Method

Abstract

A unitary lens structure and method yielding a lens for eyewear formed to a unitary structure of a first lens portion and projecting portion adapted for grinding to a prescription lens. The unitary lens can include filtering material or layers only in the projecting portion or in both the projecting portion and first lens portion. Such structure is provided through forming the projecting portions to cured optical material first, and then positioning them in a mold for the first lens portion to be formed in the unitary structure upon curing of heated material forming the first lens portion.

What is claimed is: 
     
         1 . A unitary lens structure comprising:
 a first lens portion having a first surface opposite a second surface;   a projecting portion having a sidewall defining a perimeter thereof;   a first side of said projecting portion adapted for grinding to form said projecting portion to an ophthalmic corrective lens;   a second side of said projecting portion formed in a unitary structure with said first lens portion; and   only said projecting portion includes one or more filtering materials from a group including polarizing filter layer, photo chromic filter layer, a reflective film filter layer, and a dye or light filtering particulate infused in optical material forming said projecting portion.   
     
     
         2 . A unitary lens structure comprising:
 a first lens portion having a first surface opposite a second surface;   a projecting portion having a sidewall defining a perimeter thereof;   a first side of said projecting portion adapted for grinding to form said projecting portion to an ophthalmic corrective lens;   a second side of said projecting portion formed in a unitary structure with said first lens portion; and   a curved surface formed at an intersection of said sidewall and said first side surface of said first lens.   
     
     
         3 . The unitary lens structure of  claim 1 , further comprising:
 a curved surface formed at an intersection of said sidewall and said first side surface of said first lens.   
     
     
         4 . The unitary lens structure of  claim 1  additionally comprising:
 a tooling member having a first end engaged with said first lens portion and extending to a distal end thereof adapted for engagement to a grinding machine for grinding said first side of said projecting portion. 
 
     
     
         5 . The unitary lens structure of  claim 2  additionally comprising:
 a tooling member having a first end engaged with said first lens portion and extending to a distal end thereof adapted for engagement to a grinding machine for grinding said first side of said projecting portion. 
 
     
     
         6 . The unitary lens structure of  claim 3  additionally comprising:
 a tooling member having a first end engaged with said first lens portion and extending to a distal end thereof adapted for engagement to a grinding machine for grinding said first side of said projecting portion. 
 
     
     
         7 . A method of forming a unitary lens structure having a first lens portion having a first surface area surrounding a projecting portion extending from a portion of said first surface area of said first lens portion, comprising:
 forming a projecting portion having a first side adapted for grinding to a prescription lens and having a second side opposite said first side, from optical material and curing said projecting portion to solid form;   positioning said projecting portion with said first side in communication with a mold having a cavity to form said first lens portion;   filling said cavity with heated said optical material; and   curing said heated optical material and removing said first lens portion formed to a unitary structure with said projecting portion from said mold.   
     
     
         8 . The method of  claim 7 , additionally comprising:
 during forming said projecting portion, positioning one or more filtering materials from a group including polarizing filter layer, photo chromic filter layer, a reflective film filter layer, a dye, and a light filtering particulate, within the optical material forming said projecting portion.   
     
     
         9 . The method of  claim 8 , additionally comprising:
 including in said first lens portion, one or more filtering materials from a group including polarizing filter layer, photo chromic filter layer, a reflective film filter layer, a dye, and a light filtering particulate, within the optical material forming said projecting portion.