Ocular Surface Reconstruction with Amniotic Membrane Transplantation in Pterygium

It is reported that amniotic membrane easily obtained from human body was effective to treat ocular surface disease. Authors treated pterygium, which is known to high recurrect rate, with amniotic membrane transplantation, and evaluated its effect. From June 1997 to March 1998, 28eyes(18 eyes of primary pterygium, 10 eyes of recurrent pterygium)were treated with amniotic membrane transplantation. As the results shows higher recurrent rate(4 eyes of 18 eyes(22%) in primary pteygium, 3 eyes of 10 eyes(30%)in recurrent pterygium), so amniotic membrane transplantation was less effective method to treat primary and recurrent pterygium than other method like conjunctival autograft.

A Laboratory Study of Diathermy Capsulorhexis

This study was performed to evaluate histopathologic and physical characteristics of anterior capsule during capsulorhexis with a new high-frequency diathermy.The authors investigated the histopathologic characteristics of anterior capsule according to coagulation time and anterior capsular diameter in diathermy capsulorhesxis(DC),comparing with those in continuous curvilinear capsulorhexis(CCC). Thermally induced histopathologic alter-ation was localized at anterior capsule with coagulation for 0.5 second, while it was extended into cortex with coagulation for 2 seconds.When capsulorhexis was performed with diameter of 6 mmand the margin was pulled with iris retractor,anterior capsular edge was fully extended both in CCC and DC.But with diameter of 3.5 mm,DC mostly led to tear of capsular edge on its extension,while CCC permitted full extension of anterior capsular edge.These results suggest that strength of anterior capsular edge in DC is inferior to that in CCC.However diathermy capsulorhexis is a useful alternative technique in cases,which CCC is difficult to perform,such ashypermature or congenital cataracts.