## **Core Concept**
The patient's complaint of blurring of vision with soft contact lenses, which were only 6 months old, suggests a problem with the lens power or a change in the patient's refractive error. The provided refractive error of -7.0/+3.5 X 145 indicates myopia (nearsightedness) with astigmatism.

## **Why the Correct Answer is Right**
The correct answer, **Myopic creep**, refers to a condition where there is a progressive increase in myopia, often associated with changes in the shape of the cornea or the lens inside the eye. This condition can cause previously prescribed glasses or contact lenses to become inadequate for clear vision. Given the patient's age and the relatively short period since the contact lenses were purchased, a change in refractive error such as myopic creep could explain the blurring of vision.

## **Why Each Wrong Option is Incorrect**
- **Option A: Dry eye** - While dry eye can cause discomfort and vision disturbances, it doesn't directly explain a significant change in refractive error leading to blurring with contact lenses.
- **Option B: Contact lens deposit** - Deposits on contact lenses can cause vision disturbances but typically wouldn't cause such a significant change in vision that the lenses would need to be replaced or re-prescribed so quickly.
- **Option C: Giant papillary conjunctivitis (GPC)** - GPC is an inflammatory condition affecting the conjunctiva and can be associated with contact lens wear. However, it doesn't directly explain a change in refractive error.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that young individuals, especially those in their early twenties, can experience rapid changes in their refractive error. Myopia progression can be influenced by both genetic and environmental factors. Regular eye exams are crucial in this age group to monitor for such changes.

## **Correct Answer:** . Myopic creep