Polarized Light Studies of the Cornea I. the Isolated Cornea
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The Effect of Lyophilization on Light Transmission of Amniotic Membrane: A Comparison with Rabbit Cornea
Background & Aims: Amniotic membrane persists for a long time after ocular transplantation (as corneal substitute) and can affect light transmission (transparency). The aim of this study was to evaluate the transparency of amniotic membrane after freeze-drying (lyophilization) and to compare the results with transparency of rabbit cornea. Methods: Transparency of rabbits’ corneas and fresh and ...
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The present investigation was undertak en to obtain some knowledge about the submicroscopic structure of the cornea based on thermoelastic properties and polarization characteristics. Previous workers b have reported that the cornea exhibits a birefringence of uniaxial type. But as their observations were made in parallel polarized light only, it is desirable to make conoscopic observation as w...
متن کاملPolarized Light Studies of the Cornea
A. THE MEASUREMENT OF THE RETARDATION OF THE CORNEA Preliminary experiments on the change of corneal retardation with changes in intra-ocular pressure have been described elsewhere (Stanworth, 1949, 1950). Theoretical considerations, together with measurements of the retardation of the cornea at different pressures with transmitted light passing in various directions, led to the conclusion that...
متن کاملThe Structure of the Cornea as Revealed by Polarized Light By E. J. NAYLOR
Studies of corneal sections in polarized light indicate that there are about ioo lamellae in the cat cornea; the coefficient of fibre birefringence is 0-0030. No evidence was found of preferential orientation of fibre directions. Corneal disks examined by an immersion technique show that the cornea exhibits both form and intrinsic birefringence of positive sign with a micellar refractive index ...
متن کاملKeratin 13 is a more specific marker of conjunctival epithelium than keratin 19
Introduction To evaluate the expression patterns of cytokeratin (K) 12, 13, and 19 in normal epithelium of the human ocular surface to determine whether K13 could be used as a marker for conjunctival epithelium. Methods: Total RNA was isolated from the human conjunctiva and central cornea. Those transcripts that had threefolds or higher expression levels in the conjunctiva than the cornea wer...
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