What is contrast?
It is created by the difference in luminance from two adjacent surfaces.
According to Michelson,
[Read more…] about Contrast Sensitivity and Measuring Methods
Optometric Instrumentation
How to Construct a Visual Acuity Chart?
Before constructing a Visual Acuity Chart, we need to know and decide what kind of chart we want to construct. There are actually different kinds of charts for visual acuity measurement.