Products intended to support, train or replace a person's capacity to receive, send, produce and process information in different forms, including communicating by language, signs and symbols, receiving and producing messages, carrying on conversations and using communication devices and techniques. Included are, e.g. devices for seeing, hearing, reading, writing, telephoning, signalling and alarming, information technology. Assistive products for office administration, information storage and management at work, see 28 21.

Devices for absorbing light with defined wavelengths and filtering out those that are unwanted.

Devices which enable a person to focus her/his vision. Included are, e.g. spectacle frames and electronic glasses.

Devices for enlarging the image of an object. Included are, e.g. lenses with and without illumination, loupe glasses (spectacles).

Devices for magnifying the image of a distant object for one or two eyes. Included are, e.g. spectacle-mounted monocular and binocular telescopes..

Devices for broadening or changing the angle of the visual field. Included are, e.g. prismatic spectacles, recumbent spectacles.

Devices for displaying an enlarged image of the object that has been transmitted and captured by a camera for direct display via a monitor. Included are, e.g. cameras, control units, monitors and digital systems..

Stationary systems that display an enlarged image of the subject that has been captured by a video camera

Stationary systems, with connection unit for computer, that display an enlarged image of the subject that has been captured by a video camera

portable systems that display an enlarged image of the subject that has been captured by a video camera

Accessories for image-enlarging reading devices, e.g. XY-tables.

Software for enlarging elements in the user interface, which can contain facilities e.g. for choosing colours, focus techniques. Software for output devices, see 22 39 12.