Final answer:
Decompensated phoria causes blurred vision due to improper coordination of the eye muscles, affecting the way the eyes converge and focus on objects. Blurred vision in decompensated phoria can be caused by conditions such as hyperopia, where the farsighted eye is unable to converge the rays from a close object, resulting in blurry close vision.
Step-by-step explanation:
Blurred vision is a symptom of decompensated phoria, which is a condition where the eyes are unable to maintain proper alignment. This can lead to eye strain and blurred vision, especially when focusing on close objects. The underlying cause of this symptom is the improper coordination of the eye muscles, which affects the way the eyes converge and focus on objects.
For example, if a person has a specific type of hyperopia (farsightedness), they may experience blurred vision when trying to focus on close objects. The farsighted eye is unable to converge the rays from a close object by the time they strike the retina, resulting in blurry close vision.
In addition to hyperopia, other visual conditions and eye disorders can contribute to blurred vision in decompensated phoria. It is important to consult with an eye care professional for a thorough evaluation and appropriate treatment.