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The difference between two arises also on the extent ofcapabilities and strength of medical crew accompanying the ambulance. While abasic life support ambulance can do with a simple nurse or a FR, the ALS can’t.It also needs to be well-equipped as well. Every state is free to decide itsown set of regulations. The chain of medical procedures or medical algorithmsas they are commonly called also differ from place to place. While somecountries allow only the trained medical professionals to handle a BLS case,some allow others as well – the ones proficient enough to provide a first aid.In this article, we discuss a basic life support or BLS in detail.  Glasses, also known as eyeglasses or spectacles, are devices consisting of glass or hard plastic lenses mounted in a frame that holds them in front of a person's eyes, typically using a bridge over the nose and arms which rest over the ears. Glasses are typically used for vision correction, such as with reading glasses and glasses used for nearsightedness. Safety glasses provide eye protection against flying debris for construction workers or lab technicians; these glasses may have protection for the sides of the eyes as well as in the lenses. Some types of safety glasses are used to protect against visible and near-visible light or radiation. Glasses are worn for eye protection in some sports, such as squash. Glasses wearers may use a strap to prevent the glasses from falling off during movement or sports. Wearers of glasses that are used only part of the time may have the glasses attached to a cord that goes around their neck, to prevent the loss of the glasses.