5.2: Correlation between CSF and Accommodation/Vergence in University Students

Abstract

Objective: To investigate the relationship among visual fatigue, accommodation, vergence, and CSF.Methods: 104 students were recruited (25 males, 79 females, Age 23.4±2.5), from Wenzhou Medical University, excluding high myopia, strabismus, anisometropia, eye disease and history of ophthalmological surgery. They were asked to accomplish visual fatigue survey (1) firstly. Binocular accommodative facility (BAF), vergence facility (VF) and qCSF (the area under low spatial frequency of CSF curve, LCSF; the area under middle spatial frequency of CSF curve, MCSF; the area under high spatial frequency of CSF curve, HCSF; the area under the log CSF curve, AULCSF; the cutoff spatial frequency, Cut‐Off SF) were examined in random sequence. Spearman correlation was used in study.Results: Correlations between Cut‐off SF and symptoms ‘Did you notice greater blur from the scene you were viewing?’ (r (104) = −.294, P = .002), ‘Did you see the words move, jump, swim or appear to float on the page more?’ (r (104) = −.333, P = .001), ‘Did you have greater difficulty concentrating in the task?’ (Spearman's r (104) = −.226, P = .021) were found. Correlations between BAF and symptom ‘Did you see multiple images of the sce ne more?’ (r (104) = −.308, P = .001) and ‘Did you have greater difficulty concentrating in the task?’ (r (104) = −.307, P = .002) were found. Correlations between VF a nd symptom ‘Did you have greater trouble visually focusing on the scene?’ and ‘Did you notice greater blur from the scene you were viewing?’ were found, as well. All correlations were shown in Table 1. Moreover, correl ations among BAF, VF and CSF were found in our re search. BAF was positively correlated with HCSF (r (104) =.259, P = .008) and Cut‐off SF (r (104) = .238, P = .015), shown in Figure 1. VF was negatively correlated with LCSF (r (104) = −.271, P = .005), positively conelated with Cut‐off SF (r (104) = .185, P = .060); and no correlation between VF and HCSF was found, shown i n Figure 2. Correlation between BAF and VF (r (104) = .270, P = .006), shown in Figure 3.Conclude: BAF, VF and CSF were related with visual fatigue symptoms. CSF have different correlation with BAF and VF, Cut‐off SF were positively correlated with BAF and CSF. Cut‐off SF would be an objective measurement to evaluate symptoms of visual fatigue and treatment effect of accommodative and vergence therapy.