Visual field assessment in high myopia with and without tilted optic disc

Area of Science:

• Ophthalmology
• Optometry
• Visual Neuroscience

Background:

• High myopia is a significant risk factor for various ocular pathologies.
• Tilted optic discs are a common finding in highly myopic individuals.
• The impact of tilted optic discs on visual field function requires further elucidation.

Purpose of the Study:

• To investigate the effect of tilted optic discs on visual field parameters in highly myopic eyes.
• To compare visual field test results between highly myopic individuals with and without tilted optic discs.

Main Methods:

• Fifty-eight highly myopic eyes were categorized into tilted (20 eyes) and non-tilted (38 eyes) groups.
• Visual fields were assessed using the Humphrey Field Analyzer (HFA II-i) 30-2 SITA standard protocol.
• Optic disc tilt was quantified using retinal photographs and disc ovality ratios.

Main Results:

• No statistically significant differences were found in foveal threshold sensitivity or mean deviation between the groups.
• While overall quantitative indices were similar, specific visual field patterns like arcuate scotoma and generalized depression were observed in both groups.
• The superotemporal quadrant showed the lowest average deviation in the tilted optic disc group.

Conclusions:

• Quantitative visual field indices may not fully capture the functional impact of tilted optic discs in high myopia.
• Analyzing visual field patterns offers a more nuanced approach to assessing visual field deficits in this population.
• Further research into visual field patterns is recommended for highly myopic patients with tilted optic discs.