Which of the following is an effect of poorly controlled diabetes?

Poorly controlled diabetes significantly increases the risk of various complications, one of which is vision impairment leading to blindness. This can occur due to diabetes-related eye conditions, such as diabetic retinopathy, cataracts, and glaucoma. Hyperglycemia (high blood sugar) can damage the blood vessels in the retina over time, leading to gradual vision loss.

In contrast, enhanced healing of wounds, improved cardiovascular health, and lower blood pressure are not associated with poorly controlled diabetes. Instead, individuals with uncontrolled diabetes are more likely to experience delayed wound healing due to factors like poor circulation and neuropathy. They are also at a higher risk of cardiovascular issues, as prolonged high blood glucose levels can contribute to heart disease and stroke. Moreover, poorly managed diabetes often leads to elevated blood pressure rather than lowering it. Therefore, the correct identification of increased risk of blindness highlights a critical complication resulting from poor diabetes management.