The Eye Phone Study: reliability and accuracy of assessing Snellen visual acuity using smartphone technology

被引:57
作者
Perera, C. [1 ]
Chakrabarti, R. [2 ]
Islam, F. M. A. [2 ,3 ]
Crowston, J. [2 ]
机构
[1] Fremantle Hosp, Dept Ophthalmol, Fremantle, WA, Australia
[2] Univ Melbourne, Ctr Eye Res Australia, Dept Ophthalmol, Melbourne, Vic 3010, Australia
[3] Swinburne Univ Technol, Fac Hlth Arts & Design, Dept Psychol Sci & Stat, Hawthorn, Vic 3122, Australia
关键词
SURGEONS; CHARTS; IPHONE; LOGMAR;
D O I
10.1038/eye.2015.60
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
Purpose Smartphone-based Snellen visual acuity charts has become popularized; however, their accuracy has not been established. This study aimed to evaluate the equivalence of a smartphone-based visual acuity chart with a standard 6-m Snellen visual acuity (6SVA) chart. Methods First, a review of available Snellen chart applications on iPhone was performed to determine the most accurate application based on optotype size. Subsequently, a prospective comparative study was performed by measuring conventional 6SVA and then iPhone visual acuity using the 'Snellen' application on an Apple iPhone 4. Results Eleven applications were identified, with accuracy of optotype size ranging from 4.4-39.9%. Eighty-eight patients from general medical and surgical wards in a tertiary hospital took part in the second part of the study. The mean difference in logMAR visual acuity between the two charts was 0.02 logMAR (95% limit of agreement - 0.332, 0.372 logMAR). The largest mean difference in logMAR acuity was noted in the subgroup of patients with 6SVA worse than 6/18 (n=5), who had a mean difference of two Snellen visual acuity lines between the charts (0.276 logMAR). Conclusion We did not identify a Snellen visual acuity app at the time of study, which could predict a patients standard Snellen visual acuity within one line. There was considerable variability in the optotype accuracy of apps. Further validation is required for assessment of acuity in patients with severe vision impairment.
引用
收藏
页码:888 / 894
页数:7
相关论文
共 19 条
[1]  
BAILEY IL, 1976, AM J OPTOM PHYS OPT, V53, P740
[2]   A call for national e-health clinical safety governance [J].
Coiera, Enrico W. ;
Kidd, Michael R. ;
Haikerwal, Mukesh C. .
MEDICAL JOURNAL OF AUSTRALIA, 2012, 196 (07) :430-431
[3]   The uses of the iPhone for surgeons [J].
Dala-Ali, Benan M. ;
Lloyd, Mary Anne ;
Al-Abed, Yahya .
SURGEON-JOURNAL OF THE ROYAL COLLEGES OF SURGEONS OF EDINBURGH AND IRELAND, 2011, 9 (01) :44-48
[4]   Clinical software on personal mobile devices needs regulation [J].
Fernando, Juanita I. E. .
MEDICAL JOURNAL OF AUSTRALIA, 2012, 196 (07) :437-437
[5]   Smartphone App Use Among Medical Providers in ACGME Training Programs [J].
Franko, Orrin I. ;
Tirrell, Timothy F. .
JOURNAL OF MEDICAL SYSTEMS, 2012, 36 (05) :3135-3139
[6]   Smartphone Apps for Orthopaedic Surgeons [J].
Franko, Orrin I. .
CLINICAL ORTHOPAEDICS AND RELATED RESEARCH, 2011, 469 (07) :2042-2048
[7]   OBSERVER VARIATION IN OPHTHALMOLOGY [J].
GIBSON, RA ;
SANDERSON, HF .
BRITISH JOURNAL OF OPHTHALMOLOGY, 1980, 64 (06) :457-460
[8]   Teleconsultation with the mobile camera-phone in digital soft-tissue injury: A feasibility study [J].
Hsieh, CH ;
Tsai, HH ;
Yin, JW ;
Chen, CY ;
Yang, JCS ;
Jeng, SF .
PLASTIC AND RECONSTRUCTIVE SURGERY, 2004, 114 (07) :1776-1782
[9]   Changing from Snellen to LogMAR: debate or delay? [J].
Hussain, B ;
Saleh, GM ;
Sivaprasad, S ;
Hammond, CJ .
CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY, 2006, 34 (01) :6-8
[10]  
Kaiser Peter K, 2009, Trans Am Ophthalmol Soc, V107, P311