Which condition is commonly known as lazy eye and is most prevalent in children?

• A. Blepharitis
• B. Amblyopia
• C. Conjunctivitis
• D. Cataract

Answer: (B)

Amblyopia is the condition commonly known as lazy eye and it most often affects children. It happens when the brain cannot properly use input from one eye during the critical years of visual development, so it starts favoring the other eye. This can be due to strabismus (the eyes are misaligned), a large difference in prescription between the two eyes (anisometropia), or something blocking one eye's clear view during development. Because the brain relies more on the clearer input, the weaker eye develops reduced vision, and glasses alone often don’t fix it. The key to improving vision is encouraging use of the weaker eye through methods like patching the stronger eye, atropine drops to blur the good eye, or vision therapy, and sometimes correcting alignment with surgery if needed. If not treated early, amblyopia can lead to permanent vision loss in the affected eye. The other listed conditions—eyelid inflammation, conjunctivitis, and cataracts—are not about developmental underuse of one eye and are not described as lazy eye.