Tek Hörgüçlü Devede Gözün Fibröz Tabakasında Histoanatomik Çalışmalar

Bu çalışma tek hörgüçlü 20 adet sağlıklı erişkin devede gözün fibröz tabakasının makroskobik ve mikroskobik yapılarını araştırmak amacıyla yapılmıştır. İlk olarak gözün fibröz tabakası anatomik olarak görünüş, boyut, yerleşim ve yapı bakımından incelendi. Sonrasında, hazırlanan histolojik kesitler H&E, Verhoeff, Masson'un üçlü boyası ve PAS ile boyanarak mikroskopik olarak araştırıldı. Oval şekilli deve korneasında iç açının dış açıdan daha yuvarlak olduğu gözlemlendi. Ortalama kornea uzunluğu (lateral-medial), genişliği (dorsal-ventral) ve kalınlığı sırasıyla 2.91±0.05, 2.07±0.04 ve 0.12±0.05 cm olarak ölçüldü. Skleranın en kalın yeri göz yuvarlağının posterior kutbuydu. Develerde Bowman membranı bulunmamaktaydı. Descement membranı daha düz, pembe, kalın ve şekilsiz membrandan oluşmaktaydı. Descement membranı çok fazla PAS pozitif reaksiyon ile karakterize idi. Korneanın kaudal endoteliumu PAS pozitif reaksiyon göstermezken, descement membrana bağlı ince bir bant şeklinde gözlemlendi. Skleranın yapısında kollajen fibriller oldukça kalın olup longitudinal ve transversal kesitlerde yer değiştiren formlarda gözlemlendi. Deve sklerasında küçük elastik fibriller bulunmaktaydı. Anatomik olarak bazı farklar dışında devenin kornea ve sklerası diğer toynaklı hayvanlara benzerlik göstermekteydi. Bowman katı ve descement membranındaki küçük farklar dışında devenin fibröz tabakası diğer hayvanlarınkine benzerlik göstermekteydi.

Histoanatomical Studies on the Fibrous Tunic of Eye in Dromedary Camel

This study was conducted to understand the macroscopic and microscopic structures of the fibrous tunic of 20 healthy adult dromedary camel eyes. First, the fibrous tunic of the eye was anatomically examined in terms of appearance, dimensions, location and structure. Then prepared histological slides were studied microscopically after staining by H&E, Verhoeff, Trichrome masson's and P.A.S. The result showed that in the oval-shaped camel cornea, the internal angle is rounder than the external one. The average cornea length (lateral-medial), width (dorsal-ventral), and thickness were respectively measured as 2.91±0.05, 2.07±0.04, and 0.12±0.05 cm. The thickest part of sclera is in the posterior pole of the eyeball. There was not any Bowman's membrane in camels. Descemet's membrane includes a rather even, pink, thick and shapeless membrane. Descemet's membrane is characterized with a very high positive P.A.S. reaction. Caudal endothelium of cornea did not show positive P.A.S. reaction and is observed in the form of a thin band attached to descemet's membrane. In the structure of sclera, the collagen fibers are remarkably thick, and the longitudinal and transverse cross sections are observed in the form of alternating layers. There were small elastic fibers in camel sclera. In anatomy, except for some differences, the cornea and sclera of the camel are similar to those of the other ungulates. Except for a little differences in Bowman's layer and descemet's membrane, it is similar to the fibrous tunic of the other animals.

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