Oscillopsia and Reading Abnormalities in Patients with Down-Beating Nystagmus (video)

Reading difficulties can be due to poor vision, abnormal eye movements, higher order cognitive issues, or combinations of the above. In this study, we examined the impact of down-beating nystagmus (DBN) (1-5) on reading

Oscillopsia and Reading Abnormalities in Patients with Down-Beating Nystagmus (abstract)

Reading difficulties can be due to poor vision, abnormal eye movements, higher order cognitive issues, or combinations of the above. In this study, we examined the impact of down-beating nystagmus (DBN) (1-5) on reading

Slower saccadic reading in Parkinson’s disease - Fig 1

<p><b>Irregularly (A) and regularly (B) spaced single digit number reading tests.</b> The irregularly spaced tests (KD1 irreg, KD2 irreg, and KD3 irreg) were read left-to-right twice. Then the regularly spaced tests (KD1 reg, KD2 reg, and KD3 reg) were read left-to-right (L-R) and then right-to-left (R-L). KD1 has a horizontal line to help guide reading from one number to the next, although that adds some visual crowding. KD2 has the same spacing as KD1 but has no lines to guide reading. KD3 has less vertical space between the lines compared with KD2 and therefore has the most amount of visual crowding.</p

Reading time in different number reading tests.

<p>Reading time in different number reading tests.</p

Reading time in different number reading tests.

<p>Reading time in different number reading tests.</p

PD patients read significantly slower in all reading tasks.

<p><b>(A)</b> Box-and -whisker plot of sum of KD1, KD2 and KD3 (KD123) reading times (3 pages or 120 numbers per task) for KD123 irreg, KD123 reg L-R, and KD123 reg R-L. <b>(B)</b> Box-and-whisker plot of individual KD reading times (1 page, 40 numbers per task). (<b>C</b>) Significant correlation between age and KD123 irreg reading time in the control group (R² = 0.06853 p = 0.0206). (<b>D</b>) Significant correlation between age and KD123 irreg reading times in PD (R² = 0.02389, p = 0.0010). (<b>E</b>) Significant correlation between disease duration and KD123 irreg reading time in PD group (R² = 0.1905 p = 0.0088). (<b>F</b>) No correlation between UPDRS score and KD123 irreg reading time (R² = 0.01811 p = 0.5034).</p