Conformable therapeutic shield for vision and pain

Abstract

A conformable covering comprises an outer portion with rigidity to resist movement on the cornea and an inner portion to contact the cornea and provide an environment for epithelial regeneration. The inner portion of the covering can be configured in many ways so as to conform at least partially to an ablated stromal surface so as to correct vision. The conformable inner portion may have at least some rigidity so as to smooth the epithelium such that the epithelium regenerates rapidly and is guided with the covering so as to form a smooth layer for vision. The inner portion may comprise an amount of rigidity within a range from about 1×10-4 Pa*m3 to about 5×10-4 Pa*m3 so as to deflect and conform at least partially to the ablated cornea and smooth an inner portion of the ablation with an amount of pressure when deflected.

1 . A covering to treat an eye of a patient, wherein,
 the eye comprises a cornea, an ablated stroma, and an epithelium, wherein the epithelium comprises an inner portion comprising irregularities characterized by an irregularity profile and an outer portion;   the covering comprises a conformable inner portion comprising an upper surface profile;   the covering comprises an outer portion configured to adhere to the outer portion of the epithelium; and   the upper surface profile corresponds to a profile of the ablated stroma and is configured to smooth the irregularities when the outer portion of the covering adheres to the outer portion of the epithelium.   
     
     
         2 . The covering of  claim 1 , wherein,
 the irregularity profile comprises spatial frequencies;   the upper surface profile comprises spatial frequencies; and   the upper surface profile spatial frequencies are lower than the spatial frequencies of the irregularity profile.   
     
     
         3 . The covering of  claim 1 , wherein the conformable inner portion comprises a stretchable material configured to stretch across the irregularities of the epithelium and to smooth the irregularities transferred from the irregularity profile in contact with the lower surface to the upper surface profile when the outer portion of the covering is adhered to the outer portion of the epithelium. 
     
     
         4 . The covering of  claim 1 , wherein the conformable inner portion comprises a stretchable material having a thickness profile configured to smooth the irregularities of the epithelium when the covering is positioned on the cornea. 
     
     
         5 . The covering of  claim 1 , wherein the inner portion comprises a compressible material to conform to the irregularities of the epithelium with a lower surface and smooth irregularities transferred from the irregularity profile in contact with the lower surface to the upper surface profile when the outer portion is adhered to the epithelium. 
     
     
         6 . The covering of  claim 1 , wherein the covering comprises a material having a modulus within a range from 4 MPa to 20 MPa. 
     
     
         7 . The covering of  claim 1 , wherein the covering comprises a material selected from a silicone hydrogel, silicone, and a combination thereof. 
     
     
         8 . The covering of  claim 1 , wherein the irregularities comprise high spatial frequencies and the conformable inner portion is configured to smooth the high spatial frequencies. 
     
     
         9 . The covering of  claim 7 , wherein the high spatial frequencies correspond to frequencies greater than 0.17 cycles/mm. 
     
     
         10 . The covering of  claim 1 , wherein the inner portion of the covering comprises an optical power that is from 1D to 2.5D less than the optical power of the ablated stroma.