After you fire up the barbecue grill, the charcoal briquettes you use as fuel are eventually reduced to a pile of charred remains and ashes. This residue contains recycled plant material and naturally occurring minerals, but it may also contain harmful chemicals.
Burst blood vessel in the eye. Straining, coughing or injuring your eye can sometimes cause a blood vessel to burst on the eye surface, causing a bright red blotch. This is called a subconjunctival haemorrhage.
A hyphema usually happens when an injury causes a tear to the iris or pupil of the eye. Sometimes people mistake a broken blood vessel in the front of the eye for a hyphema. A broken blood vessel in the eye is a common, harmless condition called subconjunctival hemorrhage. A subconjunctival hemorrhage does not hurt.