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Vision

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.

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Related Experiment Video

Updated: Apr 4, 2026

A Standardized Obstacle Course for Assessment of Visual Function in Ultra Low Vision and Artificial Vision

A Standardized Obstacle Course for Assessment of Visual Function in Ultra Low Vision and Artificial Vision

Published on: February 11, 2014

The Functional Vision Score-A New Method to Assess Visual Function.

Veronika Yehezkeli¹, Eden Hollander¹, Shani Shaulian¹

¹Department of Ophthalmology, Meir Medical Center, Kfar Saba, Israel, mmc.org.il.

Journal of Ophthalmology

|April 3, 2026

Summary

This summary is machine-generated.

A new Functional Vision Score (FVS) effectively measures daily visual functioning beyond just visual acuity. This simple test correlates with visual impairment severity, offering a comprehensive assessment tool.

Keywords:

assessment functional vision low vision score visual function

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Last Updated: Apr 4, 2026

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Published on: March 29, 2022

Area of Science:

Ophthalmology
Vision Science
Rehabilitation Medicine

Background:

Assessing visual functioning is crucial for daily life.
Current tests often focus solely on visual acuity, neglecting real-world performance.
A need exists for a comprehensive measure of functional vision.

Purpose of the Study:

To design and validate a functional vision test.
To evaluate visual functioning across a spectrum of daily activities.
To establish a reliable metric for assessing vision-related capabilities.

Main Methods:

Developed a 10-item test simulating daily life activities.
Included 60 participants grouped by best-corrected visual acuity (BCVA).
Measured task completion success and time, calculating a Functional Vision Score (FVS).

Main Results:

The FVS showed significant differences across visual acuity groups (p < 0.001).
A strong correlation was found between FVS and BCVA (R=0.79, p > 0.001).
Task completion times increased proportionally with visual impairment severity.

Conclusions:

The Functional Vision Score (FVS) provides a simple yet comprehensive evaluation of visual function.
It considers factors beyond visual acuity, including motor and cognitive aspects.
The FVS is a valuable tool for clinicians, patients, and official agencies.