the sight test, if the person who is being tested can recognise a test symbol that has a line width of less than 1 minute of arc, then their visual acuity will be 1. If the person being tested has a visual [...] used which are displayed at a specified distance via charts or test symbol projectors. Despite their differences in appearance, all these test symbols have one thing in common - their size is always five [...] vision aids. Determining visual acuity In order to determine the corrected visual acuity, a variety of test symbols are used by ophthalmologists and opticians. In addition to Landolt rings, Snellen charts,
smartlux® DIGITAL in the product caseEasy to wear on the smartlux® DIGITAL with the neck strap attachedTested compatibility and stabilityRelated products Electronic vision aids Art. Nr. 16502 smartlux® DIGITAL
smartlux® DIGITAL in the product caseEasy to wear on the smartlux® DIGITAL with the neck strap attachedTested compatibility and stabilityRelated products Electronic vision aids Art. Nr. 16502 smartlux® DIGITAL
the very best workmanship at all times. And thanks to high quality standards and regular quality testing in the manufacturing process, our magnifying vision aids are renowned throughout the world for their
independence and maximum quality of life. We undertake extensive design studies and representative user tests, and incorporate the findings into the further development of our products and the development of
addition, special immersion and spin coating processes provide reliable surface finishes. Quality testing using modern measurement equipment and a continuous documentation procedure guarantee that the highest
convergence adapter. Fitting caseItem No. 1630The contents of the fitting case will enable you to test most of the adjustments for close range and distance which this system allows.Contents: 2 x 1623 with
