Contact lens package

Abstract

A plastic container for storing a hydrogel contact lens in a liquid, the container comprising: a cavity and a substantially flat flange that extends in a plane around the opening periphery of the cavity, and the flange having a sealing area round the circumference of the cavity. Furthermore, the sealing area has a micro-texture pattern. When sealing the container with a flexible cover sheet which is a laminate material having a metal foil layer and at least one polymer layer to form a storage package of the soft contact lens, the micro-texture pattern of the sealing area engages a laminate foil cover and displaces water beads present between the laminate foil cover and the plastic container in the sealing area around the cavity to form a heat seal.

1 - 19 . (canceled) 
     
     
         20 . A plastic container for storing a hydrogel contact lens in a liquid, the container comprising:
 a cavity and a flat flange that horizontally extends in a plane around the perimeter of the cavity, wherein the flange having a sealing area surrounding circumferentially and adjacently about of the cavity, wherein the sealing area having a micro-texture pattern.   
     
     
         21 . The method of  claim 20 , wherein the micro-texture pattern comprises a plurality of raised spots. 
     
     
         22 . The method of  claim 20 , wherein the micro-texture pattern comprises a plurality of raised parallel lines. 
     
     
         23 . The method of  claim 20 , wherein the micro-texture pattern comprises a step height rough surface. 
     
     
         24 . The method of  claim 23 , wherein the step height rough surface pattern thereon has an overall root mean square surface roughness of between 5 μm to 50 μm. 
     
     
         25 . The method of  claim 23 , wherein the step height rough surface pattern thereon has an overall root mean square surface roughness of between 8 μm to 30 μm. 
     
     
         26 . The method of  claim 23 , wherein the step height rough surface pattern thereon has an overall root mean square surface roughness of between 10 μm to 20 μm. 
     
     
         27 . The method of  claim 23 , wherein the step height rough surface pattern thereon has an overall root mean square surface roughness of between 11 μm to 15 μm.