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Access control is really a system enabling authorities to regulate access to areas and resources in the given physical facility or computer-based information system. Access control is, the truth is, perhaps the most common, everyday phenomenon. For example, a lock on the car door is actually a kind of access control. The PIN over a bank's ATM product is another type of access control. Even nightclub bouncers, browsing front of an door, are another example of (perhaps) a much more primitive mode of access control. Using an access control mechanism is vital when persons attempt to secure confidential, important, or sensitive information and equipment.
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.
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