Blindfold
A blindfold is a covering for the eyes which prevents the wearer from seeing.
Blindfolds can range from simple cloth bands tied around the head to complex leather head harnesses which buckle around the head and neck. In SM play, blindfolds enhance the loss of control felt by the bottom and allows the top much greater control over what the bottom can experience.
Light-tightness
It is difficult to ensure that a blindfold is completely light-tight, especially in the corners of the eyes by the nose. A heavily padded leather blindfold often works well, or the blindfold can be augmented by sticky tape or by putting blobs of something soft over the eyes before applying the blindfold (ensuring that it is something that cannot damage the eyes).
Hoods may be used, though if they are made of cloth, even darlex, there may be some see-through, and with a leather or rubber hood some light may get in through the air-holes. A blindfold covered by a hood can be very effective.
