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.
Directions. 1  In a small saucepan, melt butter over medium-high heat until nut-brown in color, about 8 minutes. Remove pan from heat and pour butter into a bowl, leaving any burned sediment behind; let cool. 2  In the bowl of an electric mixer fitted with the paddle attachment, add confectioners' sugar, vanilla, salt, and butter.