The difficulty in reading text on light or dark backgrounds without eye fatigue is mainly due to individual retina sensitivity and the contrast needed for optimal perception.
The human visual system requires adequate contrast between text and background to avoid visual stress. When the background is too light or too dark, the eyes must work harder to distinguish characters, which can cause discomfort. This is related to the concept of 'digital visual fatigue'.
People with farsightedness or astigmatism tend to show greater sensitivity to these contrasts, since their eyes need to focus with greater intensity. Age also affects this ability: from age 40 onward, the loss of elasticity in the lens forces the visual system to adapt with greater effort.
Ambient lighting also plays a crucial role. Reading in spaces with insufficient light or intense glare makes perception even more difficult. According to visual ergonomics studies, a cream-colored or light gray background tends to be the most comfortable for most readers.
To mitigate this problem, it is recommended to: adjust screen brightness according to the environment, use neutral-colored backgrounds, take breaks every 20 minutes (the 20-20-20 rule), and, in extreme cases, use apps that automatically adjust contrast. Anti-glare lenses also significantly reduce fatigue in these situations.
Me encantó el artículo, explica de forma clara por qué a veces me duele la vista al leer en fondos blancos. Ahora entiendo mejor la importancia del contraste.
Excelente información, me ayudó a ajustar la configuración de mi pantalla y reducir la fatiga visual. Gracias por compartir estos consejos tan útiles.