Relationship Between Reading Performance and Saccadic Disconjugacy in Patients with Convergence Insufficiency Type Intermittent Exotropia

Overview

Journal Jpn J Ophthalmol

Specialty Ophthalmology

Date 2016 Apr 27

PMID 27112342

Citations 5

Authors

Masakazu Hirota

Hiroyuki Kanda

Takao Endo

Tibor Karl Lohmann

Tomomitsu Miyoshi

Takeshi Morimoto

Takashi Fujikado

Affiliations

Soon will be listed here.

Abstract

Purpose: To determine the relationship between re-reading the same line and saccadic disconjugacy in patients with convergence insufficiency-type intermittent exotropia [CI-type X(T)].

Methods: Eight patients with CI-type X(T) and ten healthy orthophoric individuals were studied. Video-oculography was used to assess the eye movements during the reading of a Japanese novel displayed on a 23-in. liquid crystal monitor placed 60 cm from the eyes. The sentences were displayed horizontally and read from left to right. The number of unintentional re-readings of the same line was counted, and the disconjugacy at the median of the saccade between the end of a line and the next line was determined.

Results: The number of re-readings of the same line in patients with CI-type X(T) was 4.9 ± 2.3 times which was significantly higher than that in the controls at 0.2 ± 0.4 times (P < 0.001). The saccadic disconjugacy was significantly larger in patients with CI-type X(T) at -1.70° ± 0.72° than that in the controls at -0.40°± 0.30° (P < 0.001). The number of re-readings of the same line was significantly and positively correlated with the saccadic disconjugacy (R = 0.84, R (2) = 0.71, P < 0.01).

Conclusions: The results of our study indicate that saccadic disconjugacy is associated with re-reading the same line in patients with CI-type X(T).

Citing Articles

Self-Reported Findings of the Korean Intermittent Exotropia Multicenter Study Questionnaire.

Yang H, Park S, Lee H, Kim S, Gye H, Kim S Korean J Ophthalmol. 2024; 38(3):194-202.

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Reading speed in school-age children with intermittent exotropia.

Fang C, Wu Y, Peng T, Wang C, Lou J, Xu M Sci Rep. 2022; 12(1):9423.

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An Overview of the Korean Intermittent Exotropia Multicenter Study by the Korean Association for Pediatric Ophthalmology and Strabismus.

Kim D, Baek S, Choi H, Choi D, Lee D, Lee S Korean J Ophthalmol. 2021; 35(5):355-359.

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Soft, wireless periocular wearable electronics for real-time detection of eye vergence in a virtual reality toward mobile eye therapies.

Mishra S, Kim Y, Intarasirisawat J, Kwon Y, Lee Y, Mahmood M Sci Adv. 2020; 6(11):eaay1729.

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