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Thresholds measured with the MRF. (A) Representative thresholds (dB) for one young (22-year old) participant who needed just over 4 minutes to complete. (B) Average [SEM] group threshold (circles) for five participants as a function of eccentricity. Note how increasing the size of the target with eccentricity has flattened the usual ‘Hill of Vision' that is found when testing with a size III target (gray line: −3 dB per 10°).
