طب عام وجراحةGeneral Medicine and surgery | United States America (US)

Create: 2019-10-26 Update: 2024-06-03 10:40:55

اكتشاف طبقة جديدة لقرنية العين

القرنية عبارة عن نسيج شفاف مقوس موجود في العين. تتكون من ثلاثة طبقات، يفصل بينهما غشاءان. ينكسر الضوء عند القرنية قبل أن يدخل العين.

اخبار الطبي.أعلن في دراسة وجود طبقة جديدة لقرنية العين ، يمكن أن تساعد الجراحين بشكل كبير لتحسين النتائج بالنسبة للمرضى الذين يخضعون لترقيع القرنية وزرعها.وقد اطلق عليها اسم طبقة" دوا" .ويجب استغلال وجودها لجعل العمليات أكثر أمانا وأسهل للمرضى.

من وجهة نظر سريرية، هناك العديد من الأمراض التي تؤثر على الجزء الخلفي من القرنية ,وقد بدأ الأطباء بالفعل لربط وجود أو غياب أو الدموع في هذه الطبقة.

قرنية الإنسان هي عدسة وقائية واضحة على الجزء الأمامي من العين التي من خلالها يدخل الضوء إلى العين. العلماء يعتقدون سابقا ان القرنية مكونة من خمس طبقات، من الأمام إلى الخلف، ظهارة القرنية، طبقة بومان، ستروما القرنية، غشاء ديسميه وبطانة القرنية.

تقع الطبقة الجديدة التي تم اكتشافها في الجزء الخلفي من القرنية بين سدى القرنية والغشاء ديسميه. على الرغم من أن سمكها فقط 15 ميكرون ,أنها صعبة بشكل لا يصدق وقوية بما فيه الكفاية .

أثبت العلماء وجود الطبقة من خلال عمليات لزرع القرنية وترقيعها على عيون تبرعت لأغراض البحوث .

خلال هذه الجراحة، تم حقن فقاعات صغيرة من الهواء بالقرنية لفصل الطبقات المختلفة. وقاموا بدراسة الطبقات .

طب عام وجراحةGeneral Medicine and surgery

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طب عام وجراحةGeneral Medicine and surgery

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اكتشاف طبقة جديدة لقرنية العين

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