Brief Answer: Transient blurring of vision needs evaluation. Detailed Answer: Hello Welcome to Health care magic Iam Dr. Dadapeer K, an ophthalmologist and I answer health problems related to eye. It seems from the history that you had three episodes of blurring of vision which initially appears as small spot and which gradually spreads to involve the whole of the visual field leaving the central part affecting both the eyes. This is called as transient loss of vision. The common causes for this symptom are Migraine, uncontrolled hypertension, carotid artery diseases, retinal vascular diseases... Since you are elderly male, carotid artery diseases and retinal vascular diseases have to be considered first and they have to be ruled out by examination by a physician and ophthalmologist. The transient loss or blurring of vision is called as prodromal symptom and it usually indicates some diseases which decrease blood supply to retina or to the brain. However by appropriate evaluation and treatment the underlying serious diseases can be controlled. In younger patients and rarely in older patients transient loss of vision can be caused by migraine. Though migraine is usually associated with head ache, some types of migraine like retinal migraine may not be associated with headache. Hence I advice you to consult your doctor for proper evaluation and treatment accordingly. Hope I have answered your query and the information is helpful to you. Thank you

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