From what my neuro said, that is not possible. The only way to increase the visual load is to decrease other loads. The brain is not like a muscle. Its capacity is set early in life. The biggest problem is when the brain's filtering system fails. The first line processing is supposed to limit the amount of sensory information that makes it to the conscious processing. When this first line processing fails to filter and reduce the sensory load, the conscious load can become overwhelmed resulting in failure.

For me, these word issues are minor. My memory issues are far more life changing. There are many people with similar reading struggles who live full and successful lives. It has some similarities to dyslexia. Many dyslexic do quite well despite their dyslexia.