Reading Typography and Low Vision A Few Guidelines

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Reading, Typography and Low Vision A Few Guidelines for Making Large Print Documents and Tests More Accessible

Information from the American Printing House for the Blind Developed and produced by Elaine Kitchel, M. Ed. Research Scientist © 2002 American Printing House for the Blind no portion of this presentation may be altered or used without express permission of APH. NOT FOR SALE

Reading, Typography and Low Vision What do we already know?

a bunch!

Both readers with low vision and readers with normal vision read faster and with better comprehension with a monospaced font rather than a variable font. Improvement in the low vision group was greater, however, than in the group with normal vision. Psychophysics of Reading; Legge, Gordon & Mansfield, J. Stephen

Courier Times Roman

Both persons with low vision and persons with normal vision had better reading speed and comprehension with increased leading (spacing between lines of text). Scores of persons with low vision showed more improvement with increased leading than the normal group, however. Psychophysics of Reading; Legge, Gordon & Mansfield, J. Stephen

Single Spacing 1. 25 spacing

Persons with low vision scored significantly higher in both reading speed and comprehension when they read text without serifs. Persons with normal vision showed a slight improvement using san serif fonts, but perceived themselves to have a better performance using fonts with serifs. Psychophysics of Reading; Legge, Gordon & Mansfield, J. Stephen

San Serif

Persons with low vision showed higher reading efficiency scores using fonts in which the t-heights and x-heights were generous. One-eighth inch was the minimum height which brought improved scores in the greatest number of subjects. Low Vision and Print Legibility; Arditi, Aries

X-height 1/8” at 18 points X-height 3/32” at 18 points

Persons with low vision: • often miss indented items • have trouble reading words in columns because it requres more visual shifting • do best with blocks of information at least 39 characters wide and left-justified text Low Vision Consumer Focus Group: Health Care Financing Administration

$39 Character Block Lorem ipsum moderate capsicum tentative lillium formosanum penicillin toad refractor fragment$ 39 Character Block Lorem ipsum moderate capsicum tentative lillium formosanum penicillin toad refractor fragment personification tizzwinkle periopt quizzical perianther lepidoptera transpond asparagus aluminum diamond of flagmore paphiopedilum oeonethera filamentosuma

2 Columns Lorem ipsum filament quifty purslane stylus epidendrum phototox mesianthemum orbit photosynthesis candy morose recognized or visionary combustible answer sheets forms Epidendrum phototox lorem ipsum filament morose recognized or quifty purslane stylus answer sheets forms mesianthemum orbit photosynthesis candy visionary combustible

Text is easier to read when it is justified on the left and unjustified on the right. This prevents pockets of spaces, which can be misleading to the reader with impaired vision. Existing standards of the National Acreditation Council and the National Association of the Visually impaired.

Right and Left Justified Lorem ipsum bith moderate capsicum tentative lillium formosanum and without penicillin toad refractor fragment personification tizz winkle periopt quizzical perianther how lepidoptera tune transpond for asparagus aluminum diamond of flagmore paphiopedilum oeonethera filamentosuma

Adults with vision impairment who participated in a focus group designed to determine guidelines for the preparation of large print documents agreed unanimously that text must appear without background graphics or other media which might make letters and characters difficult to discern. Low Vision Consumer Focus group: Health Care Financing Administration

This is a picture of a starfish inside a vortex. Of course to you it might look like a giant flower or an octopus in a whirlpool. You might even think it is opart or a computer rendering of a bad dream. However this photo is to demonstrate to you how difficult it is to read text when it is placed over a busy background.

This is a picture of a nice daylily called “Butterfly Kisses. ” It likes warm weather and is easy to grow if given just a little water and weeding. The flower is about 7” across and the stems are 30” tall. When the blooms are spent, a nice mound of straplike foliage stays.

Color graphics are preferred, but in their absence black and white line drawings are much easier to see and understand than grayscale. Student Survey of Large Print; Kitchel, Elaine & Evans, Will

LARGE PRINT GUIDELINES: 1 Each large print user should have access to large print that is at least 18 points in size; 2 Each large print user should have access to print that has x-height and t-heights of at least 1/8 inch; 3 Each large print user should have access to print that is in a typeface without serifs; APHont has been constructed to embody characteristics identified through research, to promote readability in persons with low vision. 4 Each large print user should have access to print that allows spacing between lines of print of at least 1 ¼ spaces.

5 Large print headings and subheadings should be larger and bolder than regular large print text. 6 Paragraphs in large print should be block style and use 1" margins. The left margin should be justified and the right hand margin should not be justified; there should be no indentations to delineate paragraphs. 7 Where possible, columns and divided words should be avoided; 8 Large print should appear black on white, ivory, cream or yellow paper with a dull finish so as not to promote glare.

9 Large print should not be used over a background design or other graphical material. 10 Large print users should have access to graphics that are enlarged AND maintain the same contrast, clarity, and appropriate coloration as those prepared for their sighted peers. 11 Highly graphical large print materials such as maps graphs and charts, should adhere to type size, font and other large print guidelines. 12 When color is not possible, high-quality, black, line drawings are preferred over gray scale.

13 Each large print user should have access to large print books that weigh no more than 32 oz. 14 Each large print user should have access to large print books that are no larger in dimension than 9” x 12” x 2 ¼ “. This guideline document is a working draft. It is subject to revision and addition.

These illustrations cover only a few of the constructs necessary for accessible large print. More mysteries of low vision and typography to be revealed.