Particularly suitable for reading over long periods of time and for users who cannot hold magnifiers freely (e.g. age-related shaking or Parkinson's disease). Magnifier heads with a diameter greater than 58 mm (Item No. 15539-, 15549-, 15599-) are fitted with a retractable red reading line for easier line orientation and increased reading speed. The rectangular magnifier heads (Item No. 15806-, 15826) are equipped with a supplementary swivel lens for additional magnification. Particularly scratch-proof lens with high visual comfort. Choice of 3 different colour temperatures via filters.