Visual Stress typically causes the following distortions of print, although not all of the following will necessarily be experienced by one person:
- Movement of print (words appearing to “jump” or move on the page)
- Whole lines of text may appear to move.
- Blurring of print
- Letters seeming to change size
- Doubling of letters
- Letters fading
- Patterns appearing
- Illusions of colour blobs moving across the page distracting the reader or obscuring the words.
- Swirling effects appear in the text.
- White "rivers" may seem to run down the page where the white background, as opposed to the black text, has become the dominant image perceived.
Examples of Visual Symptoms:
The doubling effect:
White rivers appearing in the text:
Blurring of print:
Illusions of colour blobs:
A ripple effect appearing:
Whole lines of text appearing to move:
- Frequent headaches and migraines associated with reading or computer work
- Eye strain
- Tiredness working with text, which stops very shortly after reading or computer work stops
- Eye discomfort/pain
- Experience difficulty looking at a computer screen
- Be unusually sensitive to bright lights, especially fluorescent lighting.
- Have difficulty judging heights or distances, which sometimes causes problems with stairs and/or escalators.
- Find driving at night particularly stressful, sometimes experiencing a fragmentation of reflected light.
- Develop headaches and migraines when reading.
- Fatigue quickly when working with text
- Skip words or lines when reading
- Seem to experience increased difficulty after an initial period of about 10 minutes
- Keep moving their head or body position, or moving closer to or further away from the page
- Read slowly and haltingly
- Have difficulty comprehending information
- Track with their finger
- Yawn while reading
- Frequently rub their eyes.