Differences in accommodative response under monocular and binocular conditions in young asthenopes and asymptomatic individuals with heterophoria

ZOU Bingliang; MA Minwang; ZHANG Zhixin

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Medical Journal of the Chinese People Armed Police Forces ›› 2024, Vol. 35 ›› Issue (11) : 976-980.

Differences in accommodative response under monocular and binocular conditions in young asthenopes and asymptomatic individuals with heterophoria

ZOU Bingliang, MA Minwang, ZHANG Zhixin

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Abstract

Objective To investigate the differences in monocular and binocular accommodation responses between asthenopes and asymptomatic individuals with different near heterophoria. Methods A total of 99 young subjects treated in the Ophthalmology Department of Characteristics Medical Center of Chinese People's Armed Police Force from March 2024 to May 2024 were selected and divided into symptomatic group (33 cases) and asymptomatic group (66 cases) according to the Collection Deficiency Symptom Survey Score Questionnaire (CISS). The Van-Greafe method was used to measure the short-range horizontal dissociated heterophoria, and the open-field auto-refractometer was used to measure the accommodative responses under monocular and binocular vision at a test distance of 40cm. The differences of the accommodative responses in the monocular and binocular states between the two groups were compared and statistically analyzed. Results The accommodative lag was the highest in the esophoria group under binocular vision, followed by the normal group, and the lowest in the exophoria group. There was a significant difference in the difference of accommodative lag between monocular and binocular vision between different heterophoria groups(P<0.05). In addition, in the esophoria group, the difference in accommodative lag between monocular and binocular vision was greater in the symptomatic group than in the asymptomatic group(P<0.05), but this difference was not significant in the exophoria group(P＞0.05). Conclusions The type of heterophoria in short distance can affect the accommodative responses under binocular vision, with the smallest amount of accommodative lag in exophoria patients and the largest in esophoria patients. Moreover, regardless of esophoria or exophoria, patients with asthenopia symptoms have a greater difference in accommodative lag between monocular and binocular vision than those without asthenopia symptoms, which may be one of the reasons for asthenopia in patients with heterophoria in short distance.

Key words

asthenopia / accommodative lag / heterophoria / accommodative convergence

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ZOU Bingliang, MA Minwang, ZHANG Zhixin. Differences in accommodative response under monocular and binocular conditions in young asthenopes and asymptomatic individuals with heterophoria[J]. Medical Journal of the Chinese People Armed Police Forces. 2024, 35(11): 976-980

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