Functional Assessment - Guidelines and Reports

Combining his interests in classification and in vision rehabilitation, Dr. Colenbrander has promoted a better understanding of the various aspects of vision loss, their causes, and above all their consequences for the person.

This work resulted in several reports for the ICO, the ISLRR, and the AMA.

International Visual Acuity Standard - International Council of Ophthalmology (ICO), 1984.                         Outlines requirements for standardized visual acuity measurement.   PDF  

Guide for the Evaluation of Visual Impairment, International Society for Low Vision Research and Rehabilitation (ISLRR), 1999.                                    Outlines the basis for the Functional Vision Score (FVS), which estimates visual ability based on visual acuity and visual field.   PDF

Guides to the Evaluation of Permanent Impairment, Chapter 12, the Visual System.  Amarican Medical Association (AMA), 5th edition 2001, 6th edition 2007.   Detailed guidelines for implementation of the Functional Vision Score   PDF

Visual Standards, Aspects and Ranges of Vision Loss, with Emphasis on Population Surveys.  International Council of Ophthalmology (ICO), 2002.       Application of the Functional Vision Score in statistics and eligibility rules, where statistical averages hide individual differences.    PDF

Visual Standards, Vision Requirements for Driving Safety, with Emphasis on Individual Assessment.  International Council of Ophthalmology (ICO), 2006.     Considering individual performance may require adjustments to statistical averages.     PDF

Visual Standards, Assessment and Rehabilitation of Vision-related Functioning, with emphasis on rehabilitation.  International Council of Ophthalmology and International Society for Low Vision Research and Rehabilitation (ICO, ISLRR), 2008.       Measurements of visual functions (How the EYE functions) and of functional vision (How the PERSON functions), require different measurement methodologies     PDF

                     See also: Classification and Coding projects

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