The answer to âwhat is CRM processâ may sound straightforward but it entails approaches, systems and technologies to compile information on customers across different channels or points of contact between your company and the customers.
Any type of vision loss (e.g. blindness, blurred vision, double vision, etc.) is a symptom of great concern. Many of the causes are very serious medical conditions. Certain types of vision changes can be a medical emergency where delay can lead to loss of sight (e.g. for causes such as glaucoma, eye injury, retinal detachment) or loss of life (e.g. for causes such as stroke, TIA, etc.).
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)