A child presented with difficulty in seeing the blackboard in school. His teachers say that he frequently squeezes his eyes. Most probable cause is –
**Core Concept**
Myopia, or nearsightedness, is a common vision disorder in children where distant objects appear blurry. It is often associated with prolonged near work, such as reading or watching television.
**Why the Correct Answer is Right**
The most probable cause of difficulty seeing the blackboard in school, coupled with frequent eye squeezing, is myopia. This is because myopic children tend to squint or squeeze their eyes to bring distant objects into focus. The pathophysiology involves an elongation of the eyeball, which increases the refractive power of the cornea and lens, leading to blurred vision for distant objects.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the scenario described, as it does not address the child's difficulty in seeing distant objects.
**Option B:** Although hyperopia (farsightedness) can cause difficulty seeing distant objects, it is not typically associated with eye squeezing.
**Option C:** This option is not a recognized cause of vision problems in children.
**Clinical Pearl / High-Yield Fact**
Myopic children often exhibit compensatory head posture, such as tilting their head back to reduce the distance to the object, or using their arms to bring objects closer.
**Correct Answer:** A.