Fig. 17. The optical basis for neutralization retinoscopy. The location of far points produces the “with” and “against” motions for a retinoscope with a divergent beam when performing neutralization retinoscopy. “With” motion is seen under all circumstances except when the far point of the eye-corrective lens system is situated between the cornea and the peephole of the retinoscope. The far point of the illustrated eye is at the peephole and is thus neutralized.