Accumulation of red blood cells within the anterior chamber is referred to as a hyphema. A history of trauma or recent ocular surgery are the most common risk factors. However, a seemingly spontaneous hyphema can result at times from other causes.
I don't believe in luck. I believe in grace. “It is through Him that we have received grace (God’s unmerited favor) and [our] apostleship to promote obedience to the faith and make disciples for His name’s sake among all the nations” Romans