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A microperimeter that provides fixation pattern and retinal sensitivity measurement.

Miki Sawa·Fumi Gomi·Ayako Toyoda·Yasushi Ikuno·Takashi Fujikado·Yasuo Tano
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Abstract

PURPOSE: To investigate a microperimeter (MP-1) that can independently measure fixation status and microperimetry of retinal threshold sensitivity by comparing the results obtained by the MP-1 with those obtained by scotometry using scanning laser ophthalmoscopy (SLO). METHODS: Fourteen patients (15 eyes) with a macular disorder were examined by the MP-1 fixation test, MP-1 microperimetry, and SLO scotometry. The scotoma size seen in MP-1 microperimetry was compared with that observed in SLO scotometry. The location of the preferred retinal locus (PRL) and the fixation stability, which were obtained from the fixation test in MP-1, were also compared with those obtained in SLO scotometry. RESULTS: The scotoma size, which was not seen with 0 dB in MP-1 microperimetry, was larger than that in SLO scotometry in 8 of the 15 eyes. Retinal threshold sensitivity decreases were found using MP-1 microperimetry within a sensitive area of SLO scotometry in all eyes. The PRL in the MP-1 fixation test and in SLO scotometry agreed in all eyes. Fixation stability in the MP-1 fixation test significantly correlated with that in SLO scotometry (P = 0.0192). CONCLUSIONS: The results of MP-1 microperimetry do not completely agree with those of SLO scotometry owing to the difference in stimulus intensity. The MP-1 fixation test is useful for measuring PRL and fixation stability in a short time. MP-1 might be helpful to evaluate the foveal function in patients with macular disorders without severely damaged macular function.

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AgedFemaleFixation, OcularHumansMaleMiddle AgedRetinaRetinal DiseasesScotomaSensory ThresholdsVisual Field TestsVisual PerceptionComparative StudyJournal Article

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Miki Sawa, Fumi Gomi, Ayako Toyoda, Yasushi Ikuno, Takashi Fujikado, Yasuo Tano. A microperimeter that provides fixation pattern and retinal sensitivity measurement.. https://doi.org/10.1007/s10384-005-0292-y

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