Random blog images, distorted scans, or charts that do not state the testing distance.
– Hang it at eye level for the person being tested. The room should be well-lit (ambient light ~300 lux, no glare on the paper).
Random blog images, distorted scans, or charts that do not state the testing distance.
– Hang it at eye level for the person being tested. The room should be well-lit (ambient light ~300 lux, no glare on the paper). snellen chart a4 pdf