Cover test to check eye alignment. During a cover test, your eye doctor will have you focus on a small object across the room and then he or she will cover each of your eyes alternately while you stare at the target.
They are mostly found in plant foods, such as nuts and oil. They include unsaturated fats -- monounsaturated and polyunsaturated -- and omega-3 and omega-6 fatty acids. Omega-3 fatty acids, which are found in fish, walnuts, and flaxseed oil, are thought to reduce the risk of heart disease. For this reason, three servings of fish a week are recommended. Types of Healthy Fats. 1  Monounsaturated fat is in olive and canola oil, avocados, nuts, and all-natural peanut butter.
Polyunsaturated fats are lipids in which the constituent hydrocarbon chain possesses two or more carbonâcarbon double bonds. Polyunsaturated fat can be found mostly in nuts, seeds, fish, seed oils, and oysters. Unsaturated refers to the fact that the molecules contain less than the maximum amount of hydrogen (if there were no double bonds). These materials exist as cis or trans isomers depending on the geometry of the double bond.