If the text on these web pages is too small to read comfortably, and you are using the standard Safari web browser on an iPhone or iPad, you can enlarge the text as follows. Tap on the icon near the top of the screen which shows a small rectangle with two lines below it. (depending on your Safari settings, this may also be at the bottom of the screen.)
Tapping on this icon will pop up the page menu for this web site. Tap repeatedly on the large A that has appeared to increase the text size and on the small A to reduce the text size. When you have found the text size that suits you, tap again on the page menu icon that revealed the page menu to hide the menu.
Your iPhone or iPad should remember this text size setting and use it whenever you visit this website.
If you are not using an iPhone or iPad at present, your web browser probably has a similar feature.
Sometimes, even with larger text, it can be tiring to read visually and Apple have provided a simple feature that lets you have entire pages spoken or alternatively you can have sections of text spoken just by touching them. To enable this feature go to Settings / Accessibility / spoken content and ensure that "speak screen" is turned on. Now, to have any page spoken to you swipe down with two fingers from the top of the screen or instruct Siri to "speak screen". When speech begins, a controller will appear briefly on screen and then be replaced by a smaller, dimmed icon. You can drag this icon to a position of your choice along the edge of the screen. Tapping it reveals the controller again. The controller lets you pause and resume speech. The pointing finger icon enables touch to speak mode. For more details on this and related features see "how to have screens and sections of screens spoken on iPhone and iPad".
iPhone and iPad users with low vision may also wish to view Apple's web page on low vision settings for iPhone and iPad.