Historical trial frame and lens set. Miniature travelling trial lens set from around 1900. A trial frame is used to determine an individual's lens prescription for a pair of glasses. Different lenses are inserted into the frame until the right ones or combination of ones are found. Photographed at the Royal College of Ophthalmologists,London,UK | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Thomas, Mark |
Bildgröße: | 2912 px × 4368 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |