MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Optician's eye test light box. Late 20th century. Included here are an AOX Snellen eye test chart (bottom right), an OXO fixation disparity test (bottom left), an astigmatic test chart fan chart (top), a duochrome test (red and green) with target objects known as Verhoeff's circles to test binocular vision. The tests can be illuminated as required.
Model release not required. Property release not required.