Following is a feature of concomitant squint –
**Core Concept**
Concomitant squint, also known as concomitant strabismus, refers to a type of strabismus where the angle of deviation between the eyes remains constant in all directions of gaze. This is in contrast to incomitant strabismus, where the angle of deviation varies with the direction of gaze.
**Why the Correct Answer is Right**
Concomitant squint typically presents in childhood and is often associated with a constant angle of deviation that does not change with eye movement. The underlying cause is usually a misalignment of the extraocular muscles, which can be due to various factors such as refractive errors, eye muscle weakness, or neurological disorders. In concomitant squint, the angle of deviation is equal in all directions of gaze, and the cover-uncover test reveals a constant deviation of the eyes.
**Why Each Wrong Option is Incorrect**
**Option A:** Incomitant strabismus is characterized by a variable angle of deviation that changes with the direction of gaze, which is not a feature of concomitant squint.
**Option B:** Monocular elevation weakness is a type of strabismus that affects the ability to elevate the eye, but it does not necessarily present with a constant angle of deviation in all directions of gaze.
**Option C:** Paralytic squint is caused by weakness or paralysis of one or more extraocular muscles, leading to a variable angle of deviation that changes with the direction of gaze.
**Clinical Pearl / High-Yield Fact**
Concomitant squint is often associated with a high risk of amblyopia (lazy eye), a condition where the brain favors one eye over the other, leading to decreased vision in the non-preferred eye.
**Correct Answer: C. Paralytic squint is caused by weakness or paralysis of one or more extraocular muscles, leading to a variable angle of deviation that changes with the direction of gaze.