When active in extreme weather you should always mind two things, your outfit and hydration. Keeping yourself hydrated and protected is essential, as wearing a cap and sunglasses can protect you in the sun just like scarves and gloves can protect you in the cold. Hydration is of extreme importance because you can collapse without enough water during a hot weather wave.
She suffered an injury to her frontal lube
A printable Snellen Chart, which you can download online.
Something to cover one eye at a time, like an eye patch or a paper cup.
Scissors.
Tape or tack to hang the chart on your wall.
Pencil or pen to record your results.