A patient with a small-angle esotropia views the Bagolini striated glasses target. She reports seeing a complete, unbroken letter X with all four arms present, yet cover testing confirms a manifest deviation. This response indicates:

• A Central suppression of the deviating eye
• B Normal retinal correspondence with full fusional range
• C Uncrossed diplopia requiring prismatic correction
• D Harmonious anomalous retinal correspondence ✓

Explanation

Bagolini lenses carry fine striations that let the patient see a line from each eye while preserving natural viewing conditions. A complete X in a patient with a demonstrable manifest deviation means the deviating retina has adopted an anomalous localising value that matches the objective angle exactly, which is harmonious ARC, typically seen in small-angle early-onset strabismus. Suppression would erase one arm of the cross, and true normal correspondence with diplopia would give two separate crosses rather than one intact X.

Reference: Khurana's Comprehensive Ophthalmology, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.