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Y. Matsumoto, K. Oda, M. Yuzawa; Multiple Fixation Points Observed in Reading Different Size of Text by Patients With Bilateral Macular Atrophy . Invest. Ophthalmol. Vis. Sci. 2003;44(13):2766.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: is to study how patients with bilateral macular atrophy use their retinal locations in reading different size of Japanese sentences by use of scanning laser ophthalmoscope (SLO). Methods: Nineteen patients with bilateral macular atrophy participated and 38 eyes were examined. Sentences of a fixed length (MNREAD-J sentences) was projected to patients' retina with SLO and the size of the letters were changed 1.1 through 3.5 degrees of visual angle in 0.1 log step. Patients were asked to read aloud the sentences slowly and both their voice and retina images were recorded simultaneously on video tapes so that we could locate the retinal area they were using in reading. We compared these fixation points in reading with simple fixation points obtained with SLO microperimetry. Results: In 21 of the 38 eyes, patients used the same area of the retina in all measurements. In 15 eyes, the fixation points for reading differed from the fixation area measured by microperimetry. In 8 of the 15 eyes, the fixation area for reading changed as letter size was altered. In 2 eyes, oral reading was impossible, and no fixation point was established.Conclusions: The combination of SLO with reading evaluation clarified fixation area for oral reading. Multiple fixation points were thought to be present rather commonly in eyes with macular degeneration. Fixation point was thought to be determined by macular condition and the size of the letters being read.
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