Severe myopia as a risk factor for progressive visual field loss in primary open-angle glaucoma

Area of Science:

• Ophthalmology
• Glaucoma Research
• Optic Nerve Studies

Background:

• The optic nerve head's susceptibility to glaucomatous damage in severe myopia is a key concern.
• Understanding risk factors for visual field loss is crucial for managing primary open-angle glaucoma (POAG).

Purpose of the Study:

• To investigate whether severe myopia is a significant risk factor for progressive visual field loss in POAG patients.
• To identify parameters associated with visual field defect progression in a cohort of POAG eyes.

Main Methods:

• Retrospective analysis of 122 primary open-angle glaucoma eyes with baseline optic nerve damage.
• Multivariate analysis to evaluate parameters influencing visual field defect progression.
• Subclassification of patients based on refractive error: severe myopia (< or = -4 dpt), mild myopia (-0.25 to -4 dpt), and emmetropic/hyperopic (>= 0 dpt).

Main Results:

• High mean intraocular pressure (IOP) and large refractive error were significant risk factors for visual field loss.
• Severe myopia (< or = -4 dpt) was identified as a significant risk factor for progressive visual field loss.
• Mild myopia was not a significant risk factor, differentiating its impact from severe myopia.

Conclusions:

• Severe myopia, unlike mild myopia, is a significant predictor of subsequent visual field loss in POAG.
• Managing IOP and considering refractive error are critical in glaucoma management, especially in myopic patients.