Can anyone tell me what do positive fusional vergence (PFV) and negative fusional vergence (NFV) mean? Are they the same as positive fusional convergence and negative fusional convergence?
Can anyone tell me what do positive fusional vergence (PFV) and negative fusional vergence (NFV) mean? Are they the same as positive fusional convergence and negative fusional convergence?
Clue: Convergence is a reference relating to only the horizontal component of vergence.
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