Final answer:
Bilateral hemianopia is a medical condition where patients lose lateral peripheral vision but retain other visual fields, often due to a pituitary gland growth compressing the optic chiasm.
Step-by-step explanation:
A student asked to describe a 90-degree reversing blind side (right side), however, the context provided relates to a unique clinical presentation in medicine known as bilateral hemianopia. This condition differs from tunnel vision because patients retain their superior and inferior peripheral vision, only losing visibility in the lateral fields.
In bilateral hemianopia, visual deficits result not from within the visual system, but from an external compression, such as a pituitary gland growth pressing against the optic chiasm, which interferes with signal transmission.
The axons projecting to the same side of the brain are unaffected, so the patient cannot see objects on their extreme far right and left sides.