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.
Causes of Broken Eye Blood Vessels. Broken blood vessels do not cause pain. Photo Credit red eye image by Ken Marshall from Fotolia.com. A broken blood vessel in the white of the eye, also called a subconjunctival hemorrhage, may look painful, though the bright red area does not cause damage to the eye.