Cataracts are cloudy areas that develop within the eye lens. A healthy lens is clear like a camera's, and light has no problem passing through it to the retina at the back where images are processed. When you have a cataract, the light can't get through as easily and, as a result, you can't see as well. Cataracts often form slowly, and they don't cause symptoms like pain, redness, or tearing in the eye. Some stay small and don't affect your eyesight.
A composite flight plan is actually two flight plans-one VFR and one IFR. What makes it composite is that you will transition from one to the other at some specified point during your flight.
Boeing's 787 Dreamliner will be the first commercial aircraft in which major structural elements are made of composite materials rather than aluminum alloys. There will be a shift away from archaic fibreglass composites to more advanced carbon laminate and carbon sandwich composites in this aircraft.he weight of aircraft components made of composite materials are reduced by approximately 20%, such as in the case of the 787 Dreamliner. A sample calculation of total fuel savings with a 20% empty weight reduction will be done below for an Airbus A340-300 aircraft.