He introduces basic optics , then describes performing astigmatism analysis , administering aspheric treatments that reduce spherical aberration after surgery , making calculations for vertex distance and refraction as well as intraocular lens power , performing intraocular lens calculations after surgery , correcting presbyopia surgically , ...
Then reduce the oven temperature to 170Â°C. Add the onions, garlic and thyme around the beef with about 100 ml of water. Cover with foil and cook for about 2 hours, basting from time to time and adding a little more water if necessary. This will keep the meat moist.Re-cover with the foil each time. Uncover the meat for the last 15 minutes of cooking.hen reduce the oven temperature to 170Â°C. Add the onions, garlic and thyme around the beef with about 100 ml of water. Cover with foil and cook for about 2 hours, basting from time to time and adding a little more water if necessary. This will keep the meat moist. Re-cover with the foil each time.
2. Fill the sink with 1 inch of hot water -- enough to completely cover a layer of cutlery. Pour in 1 tablespoon of baking soda, swishing it around to dissolve the powder. Add the cutlery to the baking-soda soak and allow them to sit for 10 or 15 minutes.. Pour a small amount of white vinegar onto a nonabrasive white cloth. Wipe down the cutlery with the cloth to remove general stains and marks such as white hard-water deposits.