Session: Poster session C

Comparison of Functional and Vascular Structures in Dominant and Non Dominant Eyes

Mualla HAMURCU¹, Burcu GÜLTEKIN¹, Z Nurbanu MENDI¹, Melisa GÖÇMEN¹

¹SBÜ Ankara City Hospital, Ankara, Turkey

PURPOSE:

Although the mechanism of ocular dominance is not fully understood, there are studies suggesting that it is caused by retinal anatomy, visual pathways or cortical asymmetry . In this study; we aimed to evaluate the retina and optic disc functions and the vascular structure in dominant eyes (DE) and non-dominant eyes (NDE) in healthy adults using pattern electroretinogram (pERG) and optical coherence tomography angiography (OCTA) tests.

METHOD:

68 eyes of 34 healthy subjects with bilateral visual acuity of 1.0 were included in the study. Intraocular pressure (IOP), cycloplegic spherical equivalent value, axial length, pERG and OCTA measurements were performed. Patients with SE +2.5/-2.5 D were included in the study. DE was detected by the hole-in the card test. The first group was taken as DE and the second group was taken as NDE.

RESULTS: 24 (71%) of the cases were female and 10 (29%) were male, and the mean age was 31.4±7.9 (18-35) years. Right eye dominance was observed in 24 cases (71%), and left eye dominance was observed in 10 cases (29%). No significant difference was detected between the groups in terms of pERG wave amplitudes and latencies (p>0.05). With regard to OCTA, no significant difference was detected between dominant and nondominant eyes in terms of vascular densities in the superficial and deep capillary layers (p>0.05).

DISCUSSION: Given that there was no significant difference in pERG, p50 and N95 wave amplitudes and latencies between DE and NDE in our study, it can be concluded that the two eyes are functionally similar. The similar results between the two eyes with OCTA indicate that there is no difference in terms of vascularity.

CONCLUSION: It can be concluded that there is no difference between the optic nerve and retina functions and vascular structures. It is thought that cortical structuring is more effective than ocular function in DE preference in healthy individuals.