As people get older, how they use screens changes. Many older users read more slowly, need clearer type, and prefer more space between elements. Designing for easy reading is not a niche concern, it is basic product quality, especially as more everyday services move online.
Set body text at 16px minimum, and 18px is better. Avoid thin or italic fonts for long passages, since they strain the eye. Line height should sit between 1.5 and 1.7 times the font size, with clear space between paragraphs so the text does not read as one block.
Limit line length too. A comfortable measure is roughly 60 to 75 characters per line on desktop. Very wide lines make it hard to track back to the start of the next line, which is exactly the point where older readers lose their place.
Low contrast is the most common problem in modern interfaces, usually light gray text on white. Use dark text on light backgrounds, or the reverse, and check that the contrast ratio is strong enough. Never place text over a busy photo without a solid overlay behind it.
Fingers lose precision with age, so give every button and link a generous tap area, with 44px as a practical minimum. Space out controls that sit next to each other, because a mis-tap is genuinely frustrating, and cut down on deep nested menus that hide the way forward.
Keep forms short and honest: fully visible fields, labels placed above each field rather than only as placeholder text, and error messages that say exactly what to fix. Always show where the user is on the site with a clear page heading.
The only reliable check is watching people from the target group use the interface and noting where they pause or misclick. As a Kuwait-based company working in programming, design and training since 1998, Q8DM reviews interfaces with plain questions: can the text scale up without breaking the layout? Does the keyboard flow work end to end? Can someone finish the task with no explanation? Those sessions surface problems that automated checks miss. Accessibility is not a final checklist item, it is a series of small decisions made during design.
Getting the fundamentals right serves older users and everyone else reading your site in bright sunlight on a small phone. If you want an expert review of your own interface, see the design, development and training services Q8DM has offered since 1998, or get in touch at https://q8dm.com.