الفهرس 
Introduction and Aim of The WorkOnly 14 pages are availabe for public view
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Abstract
a) This study was conducted on sixty eyes of 50 patients with complicated PDR from patients attending Minia University Hospital from August 1999 to August 2001 to undergo vitrectomy.
The diagnostic accuracies of preoperative echography were as follows:
1. 98% in diagnosis of vitreous hemorrhage.
2. 95% in diagnosis of vitreous membranes.
3. 80% in diagnosis of epicenters.
4. 95% in diagnosis of traction retinal detachment.
5. 100% in diagnosis of tractional and rhegmatogenous RD.
6. 85% in diagnosis of macular edema.
7. 60% in diagnosis of vitreoschisis.
8. 93% in diagnosis of optic nerve affection.
9. 92% in diagnosis of tractional macular detachment.
Combining the preoperative echographic results and the postoperative visual acuity results, multivarient analysis showed that the most important preoperative findings that may affect the vision were as follows:
• Optic nerve affection.
• Combined retinal detachment.
• Tractional RD.
• Macular traction.
• Macular edema.
The conclusion of this study is that preoperative echography, especially if done with three dimensional thinking, remain a very helpful tool in detecting vitreoretinal relationship in diabetic patients. It may put the plane for surgery and may give a clue for preoperative risk factors and postoperative prognosis
Is to study the efficacy of ophthalmic previtrectomy echography in :
Evaluating the vitreoretinal relationship. 1-
2- predicting visual outcome.
in cases of complicated PDR, and to correlate these findings with the operative findings.
The conclusion of this study is that preoperative echography, especially if done with there dimensional thinking, remain a very helpful tool in detecting vitreoretinal relationship in diabetic patients. it may put the plane for surgery and may give a clue for preoperative risk factors and postoperative prognosis.