A 35 year old male complains of headaches and inability to read near objects. Most probable diagnosis
**Core Concept**
The question is testing the understanding of a common clinical presentation related to refractive errors, specifically focusing on the symptoms of myopia (nearsightedness). Myopia is a condition where close objects are seen clearly, but distant objects appear blurry due to the elongation of the eyeball.
**Why the Correct Answer is Right**
The most probable diagnosis in this case is myopia. This is because the patient complains of an inability to read near objects, which is a hallmark symptom of myopia. The elongation of the eyeball leads to a longer axial length, causing light rays to converge prematurely, resulting in blurry vision for distant objects. The patient's headaches could be secondary to eye strain caused by prolonged near vision.
**Why Each Wrong Option is Incorrect**
* **Option A:** Hyperopia (farsightedness) would present with difficulty seeing close objects, but the patient's symptoms are the opposite, making this option incorrect.
* **Option B:** Presbyopia typically occurs in individuals over 40 years of age and is caused by the aging lens's decreased ability to accommodate for near vision. This patient's symptoms and age make presbyopia an unlikely diagnosis.
* **Option D:** Astigmatism can cause blurry vision, but it typically affects both near and far vision, making it less likely to be the primary diagnosis in this case.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that myopia often presents bilaterally, and patients may also experience eye strain, headaches, or blurred vision when driving at night or watching TV.
**Correct Answer:** C. Myopia