Using the White Disk Test to Predict Fusional Potential.

Abstract

INTRODUCTION:

Fusional potential in patients experiencing binocular torsional diplopia may be challenging for the clinician to assess, particularly when accompanied by vertical and horizontal diplopia.

OBJECTIVE:

To demonstrate a clinical test that may help predict if binocular fusion can be achieved once cyclotorsion is alleviated.

DESIGN:

Video recording demonstrating how to perform the white disk test and retrospective chart review of patients tested with the white disk test.

RESULTS:

Twelve patients with binocular torsional diplopia were included. All subjects had excyclotorsion, 11 (91.7%) had combined vertical and horizontal strabismus and 1 patient (8.3%) had vertical strabismus. Eleven patients (91.7%) were able to achieve single binocular vision with the white disk test and 1 patient (8.3%) demonstrated brittle fusion. The white disk test successfully predicted postoperative fusion in 10 of 11 patients (90.9%). Eight patients (66.7%) demonstrated improved stereopsis after surgery.

CONCLUSION:

The white disk test was found to be very useful in predicting fusional potential in patients that experience binocular torsional diplopia.

• Authors: Charlotte Tibi, Craig A McKeown, Hilda Capó
• Journal: Journal of binocular vision and ocular motility (J Binocul Vis Ocul Motil) 2022 Oct-Dec Vol. 72 Issue 4 Pg. 219-222 ISSN: 2576-1218 [Electronic] United States
• PMID: 35994693 (Publication Type: Journal Article)

Topics

• Humans
• Diplopia (diagnosis)
• Retrospective Studies
• Strabismus (diagnosis, surgery, complications)
• Vision, Binocular
• Depth Perception