Final answer:
Convergence can be used to judge static absolute depth in darkness but with limited accuracy due to reduced visual signals when there's small convergence.
Step-by-step explanation:
The student's question relates to the effectiveness of convergence in judging static absolute depth in darkness with a small convergence. Convergence is a binocular oculomotor cue for depth perception, referring to the ability of the eyes to move inward to focus on an object as it gets closer. The accuracy of this depth-cue, especially in darkness, is questioned in the inquiry.
The correct answer to the student's question is B) Yes, but with limited accuracy. While convergence can be used to judge depth, it is less accurate in darkness due to the reduced visual signals. The small convergence angle referenced may still allow for depth perception, but the accuracy will be limited. This is analogous to a scenario where a thin cornea allows for the fine control of vision correction, indicating that while precision is possible, it is contingent on other factors such as lighting conditions.