TY - JOUR
T1 - Kinetic visual acuity is correlated with functional visual acuity at higher speeds
AU - Iehisa, Ikko
AU - Negishi, Kazuno
AU - Ayaki, Masahiko
AU - Tsubota, Kazuo
N1 - Funding Information:
disclaimer II and KN work have been funded by Hitachi Automotive Systems, Ltd. KT has the patent (US patent No.7470026) of kinetic visual acuity meter (AS-4Fα).
Funding Information:
Hitachi Automotive Systems, Ltd.
Publisher Copyright:
© Author(s) (or their employer(s)) 2019.
PY - 2019/11/1
Y1 - 2019/11/1
N2 - Objective To measure the kinetic visual acuity (KVA) which is the ability to identify approaching objects and the functional visual acuity (FVA) which is continuous VA during 1 min under binocular and monocular condition (non-dominant eye shielding) for healthy subjects, and related ocular parameters to explore their correlation and implication in aspect of integrated visual function. Methods The mean age of the 28 participants was 38.6±8.9 years (range, 23-57 years; 6 women). A KVA metre (AS-4Fα) and FVA metre (AS-28) were used to measure KVA and FVA, respectively. Multiple regression analysis was conducted to explore correlations among the measured visual function and related parameters, including age, binocularity, best-corrected visual acuity, refraction and tear break-up time. Results The results of binocular KVA were better than monocular KVA at all speeds. A strong correlation was found between monocular and binocular KVA. The results of binocular FVA were better than monocular FVA (p<0.001) and there was a correlation between monocular and binocular FVA (R=0.638, p<0.001), as well as the maintenance rate for FVA (R=0.228, p=0.003). A linear mixed-effects model revealed that binocularity for KVA prediction was significant at all speeds and FVA was also significant at 60 km/h (p<0.05). Conclusion The current results suggest that both binocularity and FVA may contribute to KVA. Trial registration number UMIN00032385.
AB - Objective To measure the kinetic visual acuity (KVA) which is the ability to identify approaching objects and the functional visual acuity (FVA) which is continuous VA during 1 min under binocular and monocular condition (non-dominant eye shielding) for healthy subjects, and related ocular parameters to explore their correlation and implication in aspect of integrated visual function. Methods The mean age of the 28 participants was 38.6±8.9 years (range, 23-57 years; 6 women). A KVA metre (AS-4Fα) and FVA metre (AS-28) were used to measure KVA and FVA, respectively. Multiple regression analysis was conducted to explore correlations among the measured visual function and related parameters, including age, binocularity, best-corrected visual acuity, refraction and tear break-up time. Results The results of binocular KVA were better than monocular KVA at all speeds. A strong correlation was found between monocular and binocular KVA. The results of binocular FVA were better than monocular FVA (p<0.001) and there was a correlation between monocular and binocular FVA (R=0.638, p<0.001), as well as the maintenance rate for FVA (R=0.228, p=0.003). A linear mixed-effects model revealed that binocularity for KVA prediction was significant at all speeds and FVA was also significant at 60 km/h (p<0.05). Conclusion The current results suggest that both binocularity and FVA may contribute to KVA. Trial registration number UMIN00032385.
KW - vision
KW - visual perception
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U2 - 10.1136/bmjophth-2019-000383
DO - 10.1136/bmjophth-2019-000383
M3 - Article
AN - SCOPUS:85075288223
VL - 4
JO - BMJ Open Ophthalmology
JF - BMJ Open Ophthalmology
SN - 2397-3269
IS - 1
M1 - 000383
ER -