Function and Disability Journal (Jan 2023)

Examining the Relationship Between the Dominant Eye and the Dominant Hand

  • Mohammad Almasi,
  • Ali Mirzajani,
  • Jamile Abolghasemi,
  • Saeed Rahmani

Journal volume & issue
Vol. 6, no. 1

Abstract

Read online

Background and Objectives: This study aims to determine the relationship between hand dominance and ocular dominance (OD) using different test formats of handedness and ocular dominance. Methods: Three OD test formats were administered to 74 healthy young adult subjects, hole-in-card test for sighting dominance, near-point-of-convergence (NPC) test for motor dominance, and +1.50 to blur test for sensory dominance. All of these tests were performed while the best correction was in front of the subject’s eyes. An interview for preferred dominance and a finger-tapping test for performance dominance were administered to determine the dominant hand. Results: Right eye dominance was indicated in 66.2% with the hole-in-card test, 56.8% with the NPC test, and 51.4% of cases with the +1.50-to-blur test. Statistically, a significant nonrandom relationship was observed between the results of hole-in-card and NPC tests (P=0.000), hole-in-card and +1.50-to-blur tests (P=0.003), and also between the results of NPC and +1.50-to-blur tests (P=0.003). In addition, it was found that in 52.7% of the cases, all three dimensions of eye dominance (sighting, sensory, and motor) are not in the same eye and do not have pure eye dominance. In examining the dominant hand, the majority of subjects were right-handed both in the preference (62 of 74 [83.8%]) and in the performance dimension (63 of 74 [85.1%]). Statistical analysis shows a significant nonrandom relationship between the pure dominant hand and the pure dominant eye (P=0.000). In addition, the pure dominant hand (0.813) and pure dominant eye (P=0.126) are independent of gender. Conclusion: Determining the OD, similar to determining the hand dominance based on their different dimensions, can have different results. According to the results, in all dimensions of ocular and hand dominance, both the dominant eye and the dominant hand are more on the right side of people. Furthermore, the pure dominant eye and pure dominant hand are not independent of each other.

Keywords