The vision protection apparatus of the present invention includes a wiper mechanism which allows a user to clear condensation from an inner surface of a lens without removing the vision protection apparatus.

A multi-user virtual reality system for providing a virtual reality experience to a plurality of users in a body of water includes a reference system adapted for emitting and/or receiving signals. The multi-user virtual reality system includes equipment configured to be mounted to a first user in the body of water, wherein the equipment includes a first display unit and a first signal emitting or receiving system adapted for emitting and/or receiving signals. The multi-user virtual reality system includes equipment configured to be mounted to a second user in the body of water, wherein the equipment includes a second display unit and a second signal emitting or receiving system adapted for emitting and/or receiving signals. The multi-user virtual reality system includes a data processing system including one or more data processing units. The data processing system is configured for determining a position of the first user in the body of water based on at least one signal transmitted between the first signal emitting or receiving system and the reference system. The data processing system is configured for determining a position of the second user in the body of water based on at least one signal transmitted between the second signal emitting or receiving system and the reference system. The data processing system is configured for determining whether the second user in the body of water is within a first target region 480 relative to the first user in the body of water. The data processing system is configured for instructing the first display unit to display virtual reality content to the first user in the body of water. If it is determined that the second user in the body of water is inside the first target region relative to the first user, the displayed virtual reality content includes a representation of the second user.

A multi-user virtual reality system for providing a virtual reality experience to a plurality of users in a body of water includes a reference system adapted for emitting and/or receiving signals. The multi-user virtual reality system includes equipment configured to be mounted to a first user in the body of water, wherein the equipment includes a first display unit and a first signal emitting or receiving system adapted for emitting and/or receiving signals. The multi-user virtual reality system includes equipment configured to be mounted to a second user in the body of water, wherein the equipment includes a second display unit and a second signal emitting or receiving system adapted for emitting and/or receiving signals. The multi-user virtual reality system includes a data processing system including one or more data processing units. The data processing system is configured for determining a position of the first user in the body of water based on at least one signal transmitted between the first signal emitting or receiving system and the reference system. The data processing system is configured for determining a position of the second user in the body of water based on at least one signal transmitted between the second signal emitting or receiving system and the reference system. The data processing system is configured for determining whether the second user in the body of water is within a first target region 480 relative to the first user in the body of water. The data processing system is configured for instructing the first display unit to display virtual reality content to the first user in the body of water. If it is determined that the second user in the body of water is inside the first target region relative to the first user, the displayed virtual reality content includes a representation of the second user.

This invention concerns swimming or diving goggles for a user, characterized by the following combination of features: the cylindrical front vision portion (3a, 3b), on a horizontal cross-section of the lens (1a, 1b), has a thickness variation of between 2.0 mm and 4.0 mm, and the spherical lateral vision portion (4a, 4b), on a horizontal cross-section of the lens (1a, 1b), has a thickness variation of between 2.5 mm and 5 mm, and the lenses (1a, 1b) have a cylindrical curvature on a vertical cross-section of the lens (1a, 1b) of the cylindrical front vision portion (3a, 3b), and the lenses (1a, 1b) have a spherical curvature on a vertical cross-section of the lens (1a, 1b) of the spherical lateral vision portion (4a, 4b).

A dive mask including an ultrasonic communication system and an alert subsystem to measure the distance between two dive masks and alert divers if they have moved apart and exceeded a setpoint range. An illuminating edge or indicator light including at least one LED will illuminate to notify the divers they have moved apart and exceeded the setpoint range. The dive mask includes a danger function the divers may trigger to notify each other of potential danger. The dive mask includes a function to illuminate the at least one LED if the battery level in either dive mask is low.

A dive mask including an ultrasonic communication system and an alert subsystem to measure the distance between two dive masks and alert divers if they have moved apart and exceeded a setpoint range. An illuminating edge or indicator light including at least one LED will illuminate to notify the divers they have moved apart and exceeded the setpoint range. The dive mask includes a danger function the divers may trigger to notify each other of potential danger. The dive mask includes a function to illuminate the at least one LED if the battery level in either dive mask is low.

A structure of a foldable underwater sports mask, comprising a body, two lenses and a water sealing skirt, wherein the body has two lens frames and a bridge connecting the two lens frames. The two lens frames are capable of being at least partially separated from each other at an area of the bridge, so that the mask can be in a folded state for easy storage and carrying.

A mask for the activity of surface snorkelling comprising a breathing tube, a rigid frame having a connection terminal for removably connecting the breathing tube, a transparent visor, a soft face shield applicable so as to be tightly sealed against the user's face and having a diaphragm which delimits an upper viewing chamber shaped so as to contain the user's eyes and a lower breathing chamber shaped so as to contain the user's nose and mouth, and a snap locking means for locking the breathing tube to the terminal, comprising an oscillatable lever provided with a hooking tooth engageable in a hooking seat provided on the terminal, wherein the oscillatable lever is fashioned in a separate body removably fixed to the breathing tube and having a limiter for limiting the oscillation stroke of the oscillatable lever.

A mask for the activity of surface snorkelling comprising a breathing tube, a rigid frame having a connection terminal for removably connecting the breathing tube, a transparent visor, a soft face shield applicable so as to be tightly sealed against the user's face and having a diaphragm which delimits an upper viewing chamber shaped so as to contain the user's eyes and a lower breathing chamber shaped so as to contain the user's nose and mouth, and a snap locking means for locking the breathing tube to the terminal, comprising an oscillatable lever provided with a hooking tooth engageable in a hooking seat provided on the terminal, wherein the oscillatable lever is fashioned in a separate body removably fixed to the breathing tube and having a limiter for limiting the oscillation stroke of the oscillatable lever.

Provided is a pool mask that can be used even in water in the field of swimming lessons, for example. The present invention provides a pool mask that, when worn by a user, forms a predetermined space between a main body part and at least a mouth of the user and is open downward so that the space communicates with an external space. To manufacture the pool mask, first, a right main body part and a left main body part that are formed of a polyvinyl chloride material are prepared. Next, an end of the right main body part and an end of the left main body part are sewed up together to form a central part. Finally, a strap part is attached to each of the other end of the right main body part and the other end of the left main body part.