Scleral implants for treatment of presbyopia
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United States of America Patent
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Issued Date -
Feb 13, 2003
app pub date -
Jul 17, 2001
filing date -
Jul 17, 2001
priority date (Note) -
Abandoned
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Abstract
A method for treating presbyopia using a scleral insert is described. The scleral insert is prepared from either (or both) of two specific classes of polymeric materials having both viscous and elastic properties. The first class of polymeric materials has a glass transition temperature (T.sub.g) at or below human body temperature (37.degree. C.). The second class of polymeric materials has a melting temperature (T.sub.m) at or below human body temperature (37.degree. C.). The implant is stored in a frozen, rigid, elongated state prior to insertion in to the eye. Once it is placed on or within the sclera the insert responds to the increase in temperature, due to the surrounding physiochemical environment whereby it becomes soft and expands to reach its final shape. This implant can be inserted in to the eye through a much smaller incision than is used with conventional scleral implant techniques.
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