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Weiss Microcannulation System

case studies

Case 1
Left fundus of a 71-year-old man with a perfused central retinal vein occlusion (CRVO) of 1.5 months duration and 20/400 acuity.
By 1 month following retinal vein t-PA injection, the acuity improved 7 lines to 20/80, and by 2 months, the eye improved 3 more lines to 20/40.
At 6 months, the retinal hemorrhages had largely resolved but with increasing cataract, the acuity dropped slightly to 20/50. However, the Potential Acuity Meter measured the acuity at 20/20. That is a 13-line improvement over baseline.
This patient is now 1.5 years out from the procedure and even though he decided against cataract surgery, his acuity is 20/30-3.

Case 2
Right fundus of an 81-year-old woman with a perfused CRVO of 1 month duration and 20/160 acuity.
By 1.5 months post-op, the acuity had improved to 20/125.
By 2 months, there was further clearing of hemorrhage and edema and the acuity improved to 20/32, a total gain of 7 lines of acuity.

Case 3
Right fundus of a 65-year-old man with a superior hemispheric vein occlusion for 1 month and 5/200 acuity. Within 1 week post-op the acuity improved by 7 lines to 20/160.
He continued to gradually recover vision such that at 10 months, the acuity was 20/63, a total recovery of 11 lines of acuity over baseline.

Case 4
Right fundus of a 71-year-old woman with a nonperfused CRVO of 4 months duration and 5/200 acuity.
Six weeks postoperatively, there is marked clearing of macular hemorrhage and edema and the acuity improved 6 lines to 20/200.
By 6 months the acuity improved further to 20/125, which is 8 lines better than baseline. We often see this type of postoperative clearance of retinal edema and hemorrhage, even in eyes that don’t recover much vision.
 
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