iPhone screens are much smaller than our computer or iPad screens. Sometimes, especially in low light situations, its may be difficult to read text or identify the app icon we want to open. Fortunately, there is a solution. You will find an option for increasing the size of both text and icons in Settings under Display and Brightness. The image below shows you the steps to take to make using your iPhone more comfortable for your eyes.
BoomerTECH Adventures offers a course dedicated to the features on our iPhones and iPads that address vision issues. Check it out: https://www.boomertechadventures.com/downloads/15-iphone-ipad-vision-accessibility-features/
This course includes five videos: How to open your device easily; how to adjust the screen to meet your vision needs; how to make almost anything on your screen larger; how to access text more easily, and; how to take the stress out of typing.