Visual discrimination is directly connected to reading fluency. Visual discrimination is the ability to discern subtle similarities and differences visually. This is the process of seeing details. What is the same? What is different? Shapes, sizes, and colors are details to be looked at. An additional part of visual discrimination is ‘form constancy.’
Reading comprehension is the ability to understand and retain the information given in the text as you read it. Reading fluency, on the other hand, is the accuracy and speed of reading without conscious attention to the mechanics of reading. A fluent reader has the ability to read and understand words automatically. They are able to more easily comprehend complete sentences and entire reading selections.