Mary is a 42 year old amateur pilot that has fairly good eyesight, but has to wear glasses for reading. When she is flying, she needs her distance vision and so prefers not to wear her reading glasses. She can read the plane’s instruments and most maps or printed material as long as the font size is large enough. Mobile apps can be difficult to read as she is flying unless they provide options for font scaling and everything fits on the screen without having to swipe horizontally.

App:

Accommodate font size increases by at least 200%
Allow for a variable scaling of the leading that allows for easier readability


Printed Directions:

Utilize font sizes between 12 and 24 points for readability (pg 69)
Avoid using subscript and superscript (all fonts unified for ease of readability)(pg. 69)
Utilize a font with a low thick to thin stroke ration contrast (pg. 23)
 Leading between 125 – 150% of the font size (pg. 29)

Louise, 43, has excellent vision but has difficulty seeing in low light and must use a screen reader. She often translates maps, travel itineraries and weather condition reports to Mary during a flight.

App:

Allow for light scaling in the app so the user can adjust how visible the app is
Allow for the app to be fully voiced including
– directional input
– directional output

Printed Directions:

Utilize font sizes between 12 and 24 points for readability (pg 69)
Accommodate printed instructions with a digital copy that can be read through a screen reader (pg. 70)

Timothy, 68, is an amateur pilot with memory difficulties. This impacts the amount of cognitive load he can carry at one time. When reading a multi-page document or swiping through multiple screens, for example, he often cannot remember the exact details of the contents of the previous page or screen.

App:

Allowing users to remove timed functions from the app (pg. 52)
Allowing users to control the the rate at which the app functions advances through pages
Voice control on whether to move forward or backwards, to repeat instructions

Print (including the suggestions for the print materials from the previous two sections):

Avoid using any fonts with an x-height smaller than 1.5mm(pg. 27)