|Description of a colposcope|
A colposcope is a binocular microscope to examine the cervix and other parts of the lower genital tract under magnified stereoscopic vision with good illumination. A standard colposcope has essentially three parts:
The light source is fixed to the body and comprises:
The body of the colposcope is either portable or non-portable. The portable type has a single vertical stand with height adjustment facilities, fixed to a base with wheels. The non-portable type has a weighted stand with an adjustable arm, which allows the colposcope head to be manoeuvred according to the operator’s comfort.
Many types of colposcopes have the option of having a camera attachment. The camera is attached to the optics using a beam splitter through a special port at the side of the colposcope head. This allows simultaneous visualization of the image focused through the colposcope on a television monitor or a computer screen.
A video colposcope is a variant of the colposcope that does not have a binocular lens system. Video colposcopes have a video camera with LED lamps at the front of the optics, mounted on a height-adjustable stand. A control panel at the back of the head is used for changing the magnification, turning the green filter on and off, and capturing the image. Video colposcopes can autofocus the image if kept at a distance of 25–30 cm from the object. A good-quality monitor (or LED television screen) is necessary to see and interpret the two-dimensional images. Video colposcopes have the advantage of recording and storing the still or video images for future reference.