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 (15539-, 15549-, 15599-) are fitted with a retractable red reading line for easier line orientation and increased reading speed. The rectangular magnifier heads (15806-, 15826-) are equipped with a supplementary swivel lens for additional magnification. Choice of 3 different colour temperatures via filters.