Value of measurement 3 of near point convergence (NPC) following the convergence eye measurement assessment

This DE was initially created as part of Vestibular/Ocular-Motor Screening (VOMS).

2016-06-09

Mucha, A., Collins, M. W., Elbin, R., Furman, J. M., Troutman-Enseki, C., DeWolf, R. M., & Kontos, A. P. (2014). A Brief Vestibular/Ocular Motor Screening (VOMS) Assessment to Evaluate Concussions: Preliminary Findings. American Journal Of Sports Medicine, 42(10), 2479-2486. doi:10.1177/0363546514543775;Kontos, A. P., Sufrinko, A., Elbin, R. J., Puskar, A., & Collins, M. W. (2016). Reliability and associated risk factors for performance on the vestibular/ocular motor screening (VOMS) tool in healthy collegiate athletes. The American Journal of Sports Medicine, doi:0363546516632754.

A remote near point of convergence (NPC) of greater than 10 cm is a common finding in convergence insufficiency. NPC is a measurement of how close one can bring a fixation target to the nose while maintaining fusion. Normal NPC varies slightly from patient to patient, but is usually less than 10 cm from the nose.Measure the ability to view a near target without double vision. The patient is seated and wearing corrective lenses (if needed). The examiner is seated front of the patient and observes their eye movement during this test. The patient focuses on a small target (approximately 14 point font size) at arm length and slowly brings it toward the tip of their nose. The patient is instructed to stop moving the target when they see two distinct images or when the examiner observes an outward deviation of one eye. Blurring of the image is ignored. The distance in cm. between target and the tip of nose is measured and recorded. This is repeated a total of 3 times with easures recorded each time. Normal NPC values are within 5 cm. Abnormal is NPC 6 cm from the tip of the nose

Near Point Convergence in cm: Measure 2