By American Academy of Ophthalmology, Carl D. Regillo, MD
Presents present details from scientific trials on significant retinal stipulations, together with age-related macular degeneration and diabetic retinopathy. contains an summary of diagnostic ideas in retinal imaging, electrophysiologic checking out, and new genetic ways to diagnosing and classifiying retinal dystrophies and degenerations.
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Extra resources for 2007-2008 Basic and Clinical Science Course Section 12: Retina and Vitreous
In the presence of peripheral corneal neovascularization, pterygium, or nonherpetic scar, a smaller zone may be advantageous. This is because a smaller flap would avoid the peripheral corneal pathology. In cases of peripheral neovascularization the risk of significant bleeding is far less when the femtosecond laser rather than a blade microkeratome is used to create the flap. Once an appropriate zone has been determined, the maximum ablation depth can be predicted. Once the ablation depth has been calculated, the surgeon may need to adjust the ablation zone or change to a form of surface ablation.
In general, problems with intraoperative epithelial disruption are less likely to occur when using a femtosecond laser to create the flap. Diffuse lamellar keratitis is more likely to occur if an epithelial defect resulted from the microkeratome pass or flap dissection after femtosecond laser application. A defect is usually treated with a bandage contact lens (BCL). A contact lens is usually not needed if a small epithelial slip occurs. If an epithelial defect occurs on the first eye, modifications may be made to protect the epithelium on the second eye.
A certification course on microkeratome use or femtosecond laser operation may be required prior to using some equipment. Practice on animal eyes is helpful to gain comfort and experience with the operation of the equipment. Observing experienced surgeons during cases is also invaluable. Finally, having an experienced surgeon/mentor present during your first few cases is very worthwhile. The Procedure PREOPERATIVE MEDICATION Not all patients require sedation for LASIK surgery. For some the idea of taking a sedative may be anxiety provoking.
2007-2008 Basic and Clinical Science Course Section 12: Retina and Vitreous by American Academy of Ophthalmology, Carl D. Regillo, MD