The COLENBRANDER
Low Vision Measurement System

August Colenbrander, MD--San Francisco

This 12 page document describes the various modes of acuity measurement:

Letter chart acuity,
Reading acuity and
Low contrast acuity.

It presents a coordinated set of measurement tools to extend accurate measurement to the Low Vision range, including:

A letter chart for acuities down to 20/1000
Reading cards with standardized paragraphs
Mixed contrast cards for Contrast Sensitivity screening.

The document also provides suggestions for the best use of these tools.