Vision screenings in schools typically only test distance vision, whilst most learning is done up close at the reading distance.
There are 17 visual skills required for reading and learning that are not tested in most vision screenings.
When Binocular Vision Disorders are missed, some students can develop behavioural problems, while others may avoid reading or simply refuse to read. When a child has reading difficulties he/she is often labeled as being hyperactive, lazy, or a slow learner which may not be the case.
Many visual problems can easily be mistaken as learning disabilities or attention problems such as ADD (Attention Deficit Disorder).