ASYMMETRIES IN THE NORMAL SHORT-WAVELENGTH VISUAL-FIELD - IMPLICATIONS FOR SHORT-WAVELENGTH AUTOMATED PERIMETRY

PURPOSE: To quantify short-wavelength sensitivity in normal eyes by he mifield location, eccentricity, and age. METHODS: We measured achromat ic and short-wavelength thresholds across visual fields covering a rad ius of 21 degrees of visual angle in 115 normal eyes in subjects aged 17 to 77 years and out to 30 degrees of eccentricity in an additional 57 eyes in subjects aged 22 to 80 years. RESULTS: Results indicated si gnificantly greater sensitivity for the inferior visual field compared with the superior field (P=.001). The amount of asymmetry increased w ith eccentricity (P=.001) but not with age (P=.357), A temporo-nasal f ield asymmetry was noted at the most eccentric points of the 30-degree field (P=.001) but not at 21 degrees (P=.821). CONCLUSIONS: In additi on to increasing our understanding of normal retinal function, these r esults have implications for basic research in comparison with results of studies using different retinal locations to assess short waveleng th sensitivity and for clinical practice, where short-wavelength sensi tivity is used to diagnose and manage a number of diseases, including glaucoma, diabetic retinopathy, and acquired immunodeficiency syndrome (AIDS)-related vision loss.