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C.G. Brozou, A.R. Whatham, A. Déruaz, C. Mermoud, B. Rosillion, A.B. Safran; Reading Strategies for Isolated Words by Patients With Strabismic Amblyopia . Invest. Ophthalmol. Vis. Sci. 2003;44(13):4806.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To investigate the reading strategies for isolated words by patients with strabismic amblyopia using their amblyopic eye. Methods: Reading of isolated words were examined in the amblyopic and non-amblyopic eyes of four patients with strabismic amblyopia. Visual acuity in the affected eye was 0.4 logMAR or less. Isolated words (1,2,5,10 letters) in 8 different sizes (0.7 to 1.4 logMAR in 0.1 steps) were projected onto the retina using a Scanning Laser Ophthalmoscope (Rodenstock). Images were recorded directly onto videotape and then digitized. Consecutive fixation positions were extracted, using custom-written software, and converted to a format showing a cartoon of the eye movements sequence during word-reading. Results: All four patients read all presented words with both eyes. With the amblyopic eye the reading strategy was based on eccentric fixation and the use of a single preferred retinal locus (PRL) in 3 subjects and two distinct PRL in the fourth subject. Reading strategy using the non-amblyopic eye was not different from that observed in normal subjects. Conclusions: Patients with strabismic amblyopia can use their amblyopic eye to read isolated words in a similar way to patients with organic macular disorders and eccentric PRL. Amblyopic patients can also develop more than one PRL in their amblyopic eye and use them during a word-reading task.
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