1. Physics of ultrasound -- 2. Ultrasonic systems -- 3. Ocular diagnosis -- 4. Very high frequency digital ultrasound scanning in LASIK and phakic intraocular lenses -- 5. Orbital diagnosis -- App. A. Ultrasound velocity in tissue -- App. B. Axial length measurement for intraocular lens implant -- App. C. Scan reports -- App. D. Techniques of ultrasonic examination