What is the eye disorder that results in images that do not fuse, also known as lazy eye?

Amblyopia, commonly referred to as "lazy eye," is a condition in which the brain does not fully acknowledge the visual input from one eye, leading to a vision deficit. This lack of proper visual development can occur when there is a failure of the two eyes to align properly, causing the brain to disregard signals from one eye to avoid double vision. If untreated, amblyopia can lead to permanent vision impairment in the affected eye.

In contrast, strabismus is a condition characterized by misalignment of the eyes, which can lead to amblyopia if not corrected. However, strabismus on its own refers specifically to this misalignment, not the brain's response to it. Glaucoma is a group of eye diseases that result in damage to the optic nerve, often related to high intraocular pressure, and cataracts involve the clouding of the lens, affecting clarity of vision, but do not directly relate to the fusion of images. Amblyopia focuses on the brain’s processing of visual information from the eyes, making it the most accurate answer for the condition described.