Nearvisual

Nearvisual is a term used to describe the properties, functions, and design considerations related to visual processing at close viewing distances. It covers how the human visual system accommodates, converges, and processes details when objects are within arm's reach, typically within 40 cm to 60 cm of the eyes. In vision science, nearvisual function encompasses measurements such as near visual acuity, accommodation amplitude, and the near point of convergence, and it is an important aspect of diagnosing presbyopia and other near-vision disorders.

Beyond ophthalmology, nearvisual is used in ergonomics and user interface design to optimize readability on smartphones, tablets, wearables, and printed materials read at close range. Designers emphasize typography, contrast, font weight, line length, and lighting to reduce visual fatigue during sustained near work.

In cognitive neuroscience, nearvisual processing refers to neural mechanisms optimized for handling high spatial frequency content and fine detail in near space, often overlapping with object recognition tasks in foveal vision. The term is sometimes used in accessibility discussions to guide the development of near-field displays and assistive devices for people with reduced distance vision.

Related terms include near vision, presbyopia, visual ergonomics, near-work syndrome, and near-field displays. While not a formal medical diagnosis, nearvisual describes a practical domain that spans clinical assessment, design standards, and human-computer interaction.