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Analysis of reading eye movements with Tobii 1750TM eye tracker in AMD patients pre and post op ranibizumab (LucentisTM) treatment
Author(s) -
KÄLLMARK F
Publication year - 2010
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2010.289.x
Subject(s) - macular degeneration , medicine , eye movement , ophthalmology , saccade , visual acuity , reading (process) , saccadic masking , ranibizumab , optometry , eye tracking , audiology , surgery , computer science , artificial intelligence , bevacizumab , chemotherapy , political science , law
Purpose In age‐related macular degeneration (AMD), the main deficit is the loss of reading ability. The neovascular form of age‐related macular degeneration (AMD) is the leading cause of irreversible vision loss in the developed world among people over 50 years of age. With ranibizumab (Lucentis) a new efficient drug treatment has now become available. However, despite good outcome of visual acuity, patients often reports affected reading ability. A new technique to study reading performance and eye‐movements has been developed (Tobii eye tracker)and the aim of this project was to evaluate, by using the Tobii eye tracker, if patients with neovascular AMD, treated with Lucentis, gained a better reading ability. Methods Fourteen patients, with subfoveal neovascular AMD who after clinical examination was assessed for treatment with intravitrial Lucentis, were recruited. All had, before and after treatment, their reading speed, comprehension, fixations, saccadic eye movements (number of saccades per word and saccade amplitude)measured with the Tobii Eye tracker while reading two texts with an equal readability rating. Results For all eye movement parameters, except the number of regressions per word, there was no statistically significant difference when comparing the results from before and after treatment.There was a statistically significant increase in the number of regressions per word after treatment as well as increased visual acuity. Conclusion An increased VA will not necessarily equal an increased reading ability.Reading should therefor be tested in order to fully understand a patient’s complaints. The results also show that the Tobii system is suitable for evaluation of reading performance in a clinical setting.