The place where the optic nerve attaches to the retina, and so where the retina cannot detect light.
A location where radio reception and/or transmission is significantly poorer than in surrounding locations.
A location around an earthquake epicentre that is prone to earthquake.
An inability to recognize a fact or think clearly about a certain topic, especially because of a prejudice.
The part of the railway/tramway track that cannot be seen in the side mirror or the side window.
In driving, the part of the road that cannot be seen in the rear-view mirror.
A subject or area about which one is uninformed or misinformed, often because of a prejudice or lack of appreciation.
In a stadium or auditorium, any location affording those seated or standing there only an obstructed visual or auditory experience.
The location where ganglion cell axons exit the eye to form the optic nerve.