Corneal structure and transparency
نویسندگان
چکیده
منابع مشابه
Corneal structure and transparency
The corneal stroma plays several pivotal roles within the eye. Optically, it is the main refracting lens and thus has to combine almost perfect transmission of visible light with precise shape, in order to focus incoming light. Furthermore, mechanically it has to be extremely tough to protect the inner contents of the eye. These functions are governed by its structure at all hierarchical levels...
متن کاملThe cellular basis of corneal transparency: evidence for 'corneal crystallins'.
In vivo corneal light scattering measurements using a novel confocal microscope demonstrated greatly increased backscatter from corneal stromal fibrocytes (keratocytes) in opaque compared to transparent corneal tissue in both humans and rabbits. Additionally, two water-soluble proteins, transketolase (TKT) and aldehyde dehydrogenase class 1 (ALDH1), isolated from rabbit keratocytes showed unexp...
متن کاملThe balance between corneal transparency and edema: the Proctor Lecture.
The corneas of all animal species remain transparent because of the epithelial barrier, the stromal latticelike arrangement of the collagen fibrils, and the endothelial cells. Depending on the species, the corneal epithelium, the corneal endothelium, or both have a major role in regulating corneal hydration. The ultimate goal is for the cornea to remain transparent and to provide the major refr...
متن کاملSome aspects of the interrelation between corneal hydration and corneal transparency.
Corneal hydration and transparency still present multiple dilemmas to the inquiring investigator. Transparency is best explained by the oriented-lattice theory of Maurice, but, except for partly adequate electron micrographs, there is no objective evidence for the presence of such a lattice. Further, other transparent ocular structures are not constructed in this way. Relative dehydration and h...
متن کاملCorneal transparency and measurement of corneal permeability in excimer laser photorefractive keratectomy.
PURPOSE To introduce an image analysis of the cornea in photorefractive keratectomy (PRK) for preoperative and early postoperative determination of changes in the condition of the cornea. METHODS Slit-lamp videography was used to evaluate the cornea. Microdensitometry of the corneal images was performed. The optic density of the anterior, middle, and posterior corneal layers was measured. Pho...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Progress in Retinal and Eye Research
سال: 2015
ISSN: 1350-9462
DOI: 10.1016/j.preteyeres.2015.07.001