April 2014
Volume 55, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2014
The Relation Between Functional Visual Acuity and Functional Visual Field for Elderly Drivers with Normal Cognitive Status.
Author Affiliations & Notes
  • Tsutomu Shimizu
    Ophthalmology, Keio University, Tokyo, Japan
  • Sachiko Masui
    Ophthalmology, Keio University, Tokyo, Japan
  • Megumi Saiki
    Ophthalmology, Keio University, Tokyo, Japan
  • Hidemasa Torii
    Ophthalmology, Keio University, Tokyo, Japan
  • Murat Dogru
    Ophthalmology, Keio University, Tokyo, Japan
  • Kazuo Tsubota
    Ophthalmology, Keio University, Tokyo, Japan
  • Kazuno Negishi
    Ophthalmology, Keio University, Tokyo, Japan
  • Footnotes
    Commercial Relationships Tsutomu Shimizu, None; Sachiko Masui, None; Megumi Saiki, None; Hidemasa Torii, None; Murat Dogru, None; Kazuo Tsubota, Functional Visual Acuity Measurement System, US patent no.: 7470026 (P), Kowa Co. Ltd. (F); Kazuno Negishi, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science April 2014, Vol.55, 6116. doi:
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      Tsutomu Shimizu, Sachiko Masui, Megumi Saiki, Hidemasa Torii, Murat Dogru, Kazuo Tsubota, Kazuno Negishi, ; The Relation Between Functional Visual Acuity and Functional Visual Field for Elderly Drivers with Normal Cognitive Status.. Invest. Ophthalmol. Vis. Sci. 2014;55(13):6116.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose: To investigate the relationship among functional visual field, functional visual acuity, and the score of Schirmer test in elderly drivers with normal cognitive status.

Methods: Thirty eyes of 30 healthy adult volunteers (22 males and 8 females), who had no ophthalmic diseases other than refractive errors, had a normal cognitive status (23 and more with mini-mental state examination-Japanese (MMSE-J)), and drove at least once a week, were enrolled in this study. All subjects underwent slit-lamp microscopy, binocular corrected distant visual acuity (CDVA), binocular distant functional visual acuity (FVA) using the FVA measurement device Kowa AS-28 (Kowa Co Ltd, Aichi, Japan), tear break up time (BUT), Schirmer test without topical anesthesia, and functional visual field using Visual Field with Inhibitory Tasks (VFIT). VFIT is a computer software developed in 2004 to detect functional visual field for healthy subjects and cerebral injury patients. This test measures a person’s ability to recognize one object in the peripheral visual field while watching a point of regard at the center of the screen. The percentage of correct answers in VFIT is already known to have a significant correlation with the rating of driving skills using an actual vehicle (Fujita.Y et. al. Sagyoryohou [in Japanese], 2012). Spearman’s rank correlation coefficient was used to investigate the relationship between the percentage of correct answer of VFIT, CDVA and FVA.

Results: The mean age of the subjects was 66.8±4.4 years ( range: 60 to 77 years). Mean CDVA and FVA in log MAR were -0.11±0.12and -0.03±0.14, respectively. The mean percentage of correct answers in VFIT was 86.6±11.3. The mean score of Schirmer test was 8.0±6.3 mm. The mean BUT was 3.4±2.8 seconds. The percentage of correct answers in VFIT significantly correlated with FVA (r = -0.470 and P = 0.009), but not with CDVA.

Conclusions: FVA has the potential to effectively evaluate the elderly driving skills.

Keywords: 753 vision and action • 754 visual acuity  
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