Tools that help when it’s hard to see

High-tech tools can help people with vision impairment. Examples include accessibility features (such as speech-to-text or text-to-speech) on a smartphone or computer; apps for navigation, magnification, or describing a scene; wearable devices that use video cameras to capture images and then project them onto tiny screens inside a headset; peripheral prism glasses, which shift light from one side of the eye to the other to make up for losses in field of vision; and household gadgets such as “talking” thermometers, scales, and calculators that audibly read out results.