Which of the following pathological conditions is an example of strabismus?
A nystagmus
B photophobla
C cxotropia
D hordealum
The correct answer and explanation is:
The correct answer is C exotropia.
Exotropia is a type of strabismus, which is a condition where the eyes do not properly align with each other. In exotropia, one eye turns outward, away from the nose, while the other eye remains focused. This misalignment can lead to issues with depth perception and double vision. Strabismus can occur in different forms, depending on the direction of the eye misalignment. Exotropia is specifically the outward deviation of the eye.
Strabismus in general affects the coordination between the two eyes. The eyes may turn inward (esotropia), outward (exotropia), or even have vertical misalignment (hypertropia or hypotropia). When both eyes are misaligned, the brain has difficulty combining the images from both eyes into a single, clear image, which can lead to visual problems.
Exotropia can be congenital (present at birth) or acquired later in life. The causes of exotropia are varied and may include problems with the muscles that control eye movement, nerve issues, or other underlying health conditions. Treatment for exotropia typically involves corrective lenses, eye exercises, or surgery to realign the eyes and improve vision.
In contrast, nystagmus (A) refers to involuntary eye movements, typically characterized by rapid, repetitive oscillations. Photophobia (B) is sensitivity to light, often due to eye conditions or neurological disorders. Hordeolum (D) is a stye, which is an infection in the eyelid’s oil glands and is unrelated to strabismus.
Therefore, exotropia is the condition that directly relates to strabismus, as it involves abnormal alignment of the eyes.