Tapetal hyporeflectivity is most closely associated with which condition?

• A. Retinal choroidal effusion
• B. Retinal detachment
• C. Inflammatory exudates
• D. Neoplasia

Answer: (B)

Tapetal hyporeflectivity occurs when the retina separates from the underlying choroid and tapetum lucidum. In eyes with a tapetum, the normal fundic reflex is bright because light is reflected back from the tapetum. If the retina detaches, the neural retina pulls away from the tapetum, disrupting this reflective path. The area of detachment therefore appears darker on ophthalmoscopy—the tapetum is no longer effectively reflecting light back to the observer—producing a hyporeflective patch.

This pattern is most closely tied to retinal detachment because the key change is the physical separation of the retina from the choroid/taportum, directly altering the tapetal reflection. Inflammatory exudates tend to cause hazy, irregular reflectivity rather than a well-demarcated, darkened area; choroidal effusion can lead to detachment but isn’t defined by a specific tapetal hyporeflectivity itself; neoplasia presents with masses or irregular patches rather than a clean hyporeflective detachment area.