In addition to standard warranties on new items, third parties or manufacturers may sell extended warranties (also called service contracts). These extend the warranty for a further length of time. However, these warranties have terms and conditions which may not match the original terms and conditions.
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.
The most common causes of sudden loss of vision are. 1  Blockage of a major artery of the retina (central retinal artery occlusion) 2  Blockage of an artery to the optic nerve (ischemic optic neuropathy) 3  Blockage of a major vein in the retina (central retinal vein occlusion)