In medicine, a speculum is an instrument that holds parts of the body open temporarily. As the eyelids blink constantly to relieve the dryness of the eye when it is open for too long, surgeries or diagnostic procedures are easier to perform with an eyelid speculum keeping the eye open for longer than usual. Examples of situations where an eyelid speculum may be used include laser eye surgeries, cataract removal operations and some eye examinations. A variety of medical procedures involve the use of a speculum, as many parts of the human body have orifices or cavities that are protected either by a closing mechanism, like the eye, or a flexible tissue wall, such as the ear canal. As these areas require a tool to open the cavity further or for longer than usual, the medical profession invented the speculum. Typically, a speculum has handles for the doctor to hold, which are attached to a set of jaws that are either flexible within a certain opening range, or which can be set to a specific opening width.
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You might have been performing oral sex, or he might have pulled out at the wrong moment. In any event, you can wind up in the awkward position where you have cum in eye. If this is a question which you have asked at some point, you are not alone. When the cum hits your attention, your initial response may be to panic. You may worry that it could affect your physical health or that it will harm your eye. The most likely result may be a few short pain, swelling or burning. Your primary worry is about what to do to stop sexually transmitted diseases.