Examination of a soft contact lens with a prolonged duration on corneal surface

Objective & Hypothesis:Analysing a soft contact lens and deposits who has remainded for a prolonged continuous duration on ocular surface was aimed.

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Key Findings & Data:Patient history revealed that it has remained in the eye for 11 years.

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Conclusion & Impact:Dense contact lens deposits caused by a very prolonged wear were granular in apperance with a low calcium content.

🔬Design:Research Article

📍Scope:Comprehensive Sample

⚙️Variables:Kontakt lensler · hidrofilik · Kornea

Abstract

Analysing a soft contact lens and deposits who has remainded for a prolonged continuous duration on ocular surface was aimed. In examination of a patient with absolute glaucoma and bullous keratopathy, a contact lens with tight adherence onto the cornea was noticed. Patient history revealed that it has remained in the eye for 11 years. The removed contact lens was first examined by stereomicroscope and then by scanning electron microscope (SEM) and element analysis. It was seen that contact lens surface was covered with diffuse deposits regionally heaped up in the interpalpebral area by stereomicroscopy and SEM examination. SEM apparence of contact lens deposits displayed small and big tuberescences and cracks on an irregular surface. A small amount of calcium (Ca), potassium (K), and sulphur (S), high amount of magnesium (Mg) and silisium (Si) content was found by element analysis of these dense deposits. Dense contact lens deposits caused by a very prolonged wear were granular in apperance with a low calcium content.

Özet

Uzun süre göz yüzeyinde kalmış bir yumuşak kontakt lensin ve üzerindeki birikintilerin incelenmesi amaçlandı. Absolü glokomlu ve büllöz keratopatili bir hastanın muayenesinde korneaya sıkıca yapışan bir kontakt lens farkedildi. Hasta öyküsünde kontakt lensin 11 yıl boyunca gözde kalmış olduğu ifade edildi. Çıkarılan kontakt lens önce stereomikroskop, sonra tarayıcı elektron mikroskop (SEM) ve element analizi ile incelendi. Kontakt lens yüzeyi stereomikroskobi ve SEM incelemesinde kapak aralığı alanında bölgesel olarak yoğunlaşan yaygın birikintilerle kaplıydı. Kontakt lens birikintilerinin SEM görünümlerinde düzensiz yüzeyde irili ufaklı kabarıklıklar ve aralarındaki çatlaklar izlendi. Yoğun kontakt lens birikintilerinin element analizi incelenmesinde küçük bir miktar kalsiyum (Ca), potasyum (K) ve sülfür (S); yüksek miktarda magnezyum (Mg) ve silisyum (Si) içeriği bulundu. Uzun süre kornea yüzeyinde kalan kontakt lens üzerinde gelişen yoğun birikintilerin granüler görünümde olup, düşük miktarda kalsiyum içerdiği saptandı

Keywords

Kontakt lensler hidrofilik Kornea Mikroskopi elektron tarama Contact Lenses Hydrophilic Cornea Microscopy Electron Scanning

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Cite This Article

KAYIKÇIOĞLU, Ö. R., TOPÇUOĞLU, N., KÖKTÜRK, U., YILMAZ, H. (2005). Examination of a soft contact lens with a prolonged duration on corneal surface. MN Oftalmoloji, Cilt: 12 - Sayı: 1, 82–84. https://ajindex.com/articles/296067

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