A New Topography Triads for Diagnosis and Grading of Pellucid Marginal Degeneration
- سال انتشار: 1397
- محل انتشار: بیست و هشتمین کنگره سالیانه انجمن چشم پزشکی ایران
- کد COI اختصاصی: ACSOMED28_112
- زبان مقاله: انگلیسی
- تعداد مشاهده: 521
نویسندگان
Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
چکیده
Purpose: To introduce the new topographic criteria for diagnosing and grading the severity of pellucid marginal degeneration (PMD). Methods: In this case-control study, the topography patterns of patients who were referred to Cornea and refractive services of Labbafinejad Medical Center or a private clinic for refractive surgery or management ofcorneal diseases and were diagnosed as early, subclinical or clinical KCN or PMD were reviewed. Results: The topography patterns of 120 subjects were evaluated. The indices and pattern analysis showed that three fundamental parameters can be considered as diagnostic signs characterize all stages including early/subclinical PMD. These parameters included A) an inferior flattening area surrounded by steep areas, inferior to the horizontal axis (IFA), B) an apple shaped pattern, instead of the usual pear shaped pattern that is common in KCN. C) Superior flattest area (SFA), could be helpful for diagnosing of PMD. In addition, we noticed that measuring the extent of IFA could be helpful for staging the PMD. Against the rule astigmatism (flat meridians @45-135 degrees) can be considered as a characteristic for diagnosing the early stage of PMD. Based on these three parameters, 36 cases of PMD were correctly differentiated from KCN and normal corneal topography. Conclusion: Three main signs including inferior flattening, apple pattern and flattest area (quadrant superior) can be consider as the diagnostic signs characterize for PMD.کلیدواژه ها
اطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.