A whiteout is a reduction and scattering of sunlight. Cause: Sunlight is blocked, reduced and scattered by ice crystals in falling snow, wind-blown spin-drift, water droplets in low-lying clouds or localised fog, etc. The remaining scattered light is merged and blended.

What causes white out vision?

It can be caused by heat exhaustion, dehydration, emotional distress, standing up quickly, taking certain medications, heart problems or a sudden drop in blood pressure. Whiteouts due to cardiovascular changes are more common in aging adults and can often be reversed by having them sit down for moment to regroup.

Is there a difference between blacking out and whiting out?

Some people use the terms blackout and fainting interchangeably, but they are two different things. A blackout is a loss of memory. Fainting, also called passing out, is a loss of consciousness. Both of these can have several different causes.