What should I assess with XREAL prescription inserts?
Assess the complete approved lens and frame configuration you intend to use. Read the center and edges with the glasses resting normally. A store demo without your correction cannot settle how the final assembly will work for you.
Fit and readability belong in the same trial
Ask the seller or fitting professional to explain the supported arrangement before ordering. Avoid improvising a modification from visual similarity alone. The goal is a configuration that can be fitted and serviced through its intended route.
Bring an ordinary text sample and include small controls near the screen edges. If adjustment improves one area while another becomes harder to see, describe that observation to the fitter. It is useful evidence about the assembly, rather than a reason to keep changing software settings at random.