Macular asymmetry analysis in sighting ocular dominance

Area of Science:

• Ophthalmology
• Neuroscience
• Vision Science

Background:

• Sighting ocular dominance describes an individual's preference for using one eye for sighting.
• Understanding the anatomical and vascular correlates of ocular dominance is crucial for vision science.

Purpose of the Study:

• To investigate potential associations between sighting ocular dominance and interocular/intraocular macular thickness.
• To examine differences in the fovea-optic disc angle and foveal blood vessel counts related to ocular dominance.

Main Methods:

• A prospective, cross-sectional study involving 45 healthy young adults (90 eyes).
• Sighting ocular dominance was assessed using the hole-in-the-card test.
• Macular thickness, posterior pole asymmetry, fovea-optic disc angle, and foveal blood vessel counts were analyzed using spectral domain optical coherence tomography (SD-OCT).

Main Results:

• No statistically significant interocular differences were found in total macular thickness or macular thickness in superior/inferior hemispheres.
• Macular asymmetry analysis showed no significant interocular variations.
• The mean fovea-optic disc angle and the number of visible foveal blood vessels were similar between dominant and nondominant eyes.

Conclusions:

• The study found no significant association between sighting ocular dominance and interocular or intraocular macular thickness.
• Differences in fovea-optic disc angle and foveal blood vessel counts are not linked to sighting ocular dominance in healthy young adults.
• These findings suggest that basic ocular structural and vascular metrics are independent of the preferred sighting eye.