Biomechanics of Incisional Surgery
Fig. 3.1 The dioptric plot is color-coded so that steep and flat areas on the cornea can be easily visualized. An eye with irregular astigmatism is shown The corneal structural…
Biomechanics of Subtractive Surgery: From ALK to LASIK
Fig. 4.1 Individual lamella showing orientation of the collagen fibrils We then postulate that a strain energy density W for an individual lamella takes the form [4] where C is…
Biomechanics of Additive Surgery: Intracorneal Rings
Fig. 5.1 First patient operated with the Ferrara ring (postkeratoplasty high astigmatism) The excellent tolerance to the implant by the transplanted cornea gave us the necessary confidence to apply the…
Corneal Biomechanics
Fig. 2.1 Mean corneal radii of curvature and thicknesses At the apex, a wide range of variation of the radius of curvature of 7–8.5 mm is compatible with good visual function,…
Introduction: Corneal Biomechanics and Refractive Surgery
Fig. 1.1 A diagram of a radial keratotomy with four incisions and the effect of the intraocular pressure. The cornea bends in the incised area and flattens in the not-incised…
Corneal Collagen Cross-Linking for Keratoconus and Corneal Ectasia
Fig. 6.1 (a) Slit lamp image confirming corneal riboflavin uptake and anterior chamber flare. (b) Photograph of patient being treated with UVA 365 nm light at an irradiance of 3.0…
Diagnosis and Management of Ocular Surface Disease
Eyelid abnormalities Ectropion Entropion Lagophthalmos Floppy eyelid syndrome Conjunctival abnormalities Pinguecula Pterygium Trabeculectomy Superior limbic keratoconjunctivitis Conjunctivochalasis Corneal disorders Anterior basement membrane disease Recurrent erosion syndrome Salzmann nodular degeneration After…
Advances in the Diagnosis and Management of Infectious Keratitis
Organism Stains Culture media PCR target Confocal microscopy Bacteria Aerobic Gram Blood 16 s RNA No, exc. specific patterns, e.g., infectious crystalline keratopathy Giemsa Chocolate Acridine orange Broth (thioglycollate, eugonic,…
Imaging Techniques for Corneal Disorders
Fig. 4.1 Corneal layers as imaged with the confocal microscope. Corneal epithelium: seen with bright nuclei, (a); subbasal nerve plexus, (b); corneal stroma with keratocytes, (c); corneal endothelium with hexagonal…
Boston Keratoprosthesis
Fig. 9.1 This is a slit lamp photograph of a failed graft after several repeat corneal transplants, which would be high risk for another standard penetrating keratoplasty According to the…
