Citations:occularium


 * 1879, The Archaeological Journal, page 85:
 * This visor is remarkable as possessing besides the usual horizontal slit or occularium for sight, an opening on the dexter side, defended from the opposing lance by the metal being turned forward.
 * 1909, Charles Henry Ashdown, Arms & Armour:
 * The occularium is formed by a row of circular apertures in a reinforcing plate. This massive form of visor is well shown on the head of Thomas de Beauchamp (Fig . 175) on the celebrated Hastings brass,
 * 1996, Anthony Wood, Heraldic Art and Design
 * The reinforcement around the occularium is purely for decoration, as are the piping around the base and the ventilation holes, and would not have been found on a genuine helm of the period.
 * 2018, Douglas Strong, Surviving Examples of Early Plate Armour (1300-1430): Volume I: Bascinets, ISD LLC (ISBN 9781937439460), page 130:
 * The occularium is boxed-out but not opened. Instead, there is a double row of square holes. There would have been 15 holes originally. The side of the occularium protrusion is pierced with a group of three holes.
 * 2021, Charles Henry Ashdown, British and Foreign Arms & Armour, Good Press
 * No breathing-holes are shown, and the occularium is extremely narrow. As weight was apparently of no object at this period, ...