Vision changes and problems can be caused by many different conditions. Presbyopia -- difficulty focusing on objects that are close. This problem often becomes noticeable in your early to mid 40s. Cataracts -- cloudiness over the eye lens, causing poor nighttime vision, halos around lights, and sensitivity to glare. Cataracts are common in the elderly. Glaucoma -- increased pressure in the eye, which is most often painless. Vision will be normal at first, but over time you can develop poor night vision, blind spots, and loss of vision to either side. Glaucoma can also happen suddenly, which is a medical emergency. Diabetic eye disease.
The normal blood glucose level (tested while fasting) for non-diabetics, should be between 3.9 and 5.5 mmol/L (70 to 100 mg/dL). The mean normal blood glucose level in humans is about 5.5 mmol/L (100 mg/dL); however, this level fluctuates throughout the day.he normal blood glucose level (tested while fasting) for non-diabetics, should be between 3.9 and 5.5 mmol/L (70 to 100 mg/dL). The mean normal blood glucose level in humans is about 5.5 mmol/L (100 mg/dL); however, this level fluctuates throughout the day.
For a person without diabetes, the normal glucose levels should be in the range of 70 to 120 mg/dl. According to American Diabetes Association, the normal glucose range for diabetics should always be less than 154 mg/dl. The normal glucose range for children before breakfast should be in the range 70 to 99 mg/dl. Two to four hours after a meal, the normal glucose range should be between 70 to 139 mg/dl. We will now see the normal range for glucose at different times of the day.