Final answer:
For accommodating visually impaired viewers, it's necessary to use clear, high-quality visuals, maintain a consistent visual style, and use an adjustable font size that starts at a minimum of 14 points for regular text. Larger text sizes may be required for significant visual impairments, and considering accessibility through alternative visual aids or presentation adaptations can improve comprehension for all.
Step-by-step explanation:
For visually impaired viewers, it is essential to ensure that visuals are large enough for the audience to see clearly. When creating or obtaining media for a presentation, using high-quality, clear, and concise materials is crucial. Small, hard-to-read graphs or poor audio clips can be frustrating and hinder comprehension. Additionally, maintaining a consistent visual style with appropriate font sizes, colors, and backgrounds is necessary to facilitate readability and understanding.In terms of text size, the Web Content Accessibility Guidelines (WCAG) recommend using a font size that is adjustable by the viewer but starts at a minimum of 14 points for regular text and 18 points or 14 points bold for large text. This is to account for viewers with less than perfect vision without the need for a screen magnifier. In cases where the audience includes individuals with significant visual impairments, larger text sizes, such as those depicted on a Snellen chart for individuals with 20/200 vision, might be required.When considering the accessibility of presentations for an audience with vision impairments, visual representation through infographics can be an effective alternative. Furthermore, adapting the delivery of a presentation to accommodate specific needs, such as providing ample time for viewing media or using an interpreter, can significantly enhance accessibility for all audience members.