What is most indicative of a deep corneal abrasion in an eye trauma case?

In the context of diagnosing a deep corneal abrasion following eye trauma, the most indicative finding would be the staining with fluorescein showing deep uptake. When fluorescein dye is applied to the eye, it highlights areas of epithelial damage. In cases of deep corneal abrasions, the dye will penetrate through the damaged corneal epithelium and stain the deeper layers of the cornea, indicating the extent of the injury. This finding is crucial because it helps in assessing the severity of the abrasion and determining the appropriate management.

On the other hand, while the presence of a visible foreign body could suggest an abrasion, it does not specifically indicate the depth of the injury. Persistent vision clarity after trauma could suggest a minor injury or superficial abrasion, not a deep one. Lastly, normal visual acuity may be maintained in certain cases despite the presence of an abrasion, but it does not provide information about the depth or severity of the ocular injury. Therefore, the deep uptake of fluorescein is the most telling sign of a significant corneal abrasion.