Assessment of Color Vision Among School Children: A Comparative Study Between The Ishihara Test and The Farnsworth D-15 Test
DOI:
https://doi.org/10.31729/jnma.2743Keywords:
color vision; children; defect; Farnsworth D-15; Ishihara.Abstract
Introduction: Color vision is one of the important attribute of visual perception. The study was conducted at different schools of Kathmandu to compare the findings of the Ishihara Pseudoisochromatic test and the Farnsworth D-15 test.
Methods: A cross-sectional study was conducted among 2120 students of four schools of Kathmandu. Assessment included visual acuity measurement, slit lamp examination of anterior segment and fundus examination with direct ophthalmoscopy. Each student was assessed with the Ishihara pseudoisochromatic test and the Farnsworth D-15 test. The Chi-square test was performed to analyse color vision defect detected by the Ishihara test and the Farnsworth D-15 test.
Results: A total of 2120 students comprising of 1114 males (52.5%) and 1006 females (47.5%) were recruited in the study with mean age of 12.2 years (SD 2.3 years). The prevalence of color vision defect as indicated by the Ishihara was 2.6 and as indicated by the D-15 test was 2.15 in males.
Conclusions: For school color vision screening, the Ishihara color test and the Farnsworth D-15 test have equal capacity to detect congenital color vision defect and they complement each other.
Keywords: color vision; children; defect; Farnsworth D-15; Ishihara.
References
about everyday tasks? Optom Vis Sci. 1989;66:288-95.
2. Committee on vision. Procedures for testing color vision
report of working group 41, Washington DC: National
Academy press 1981.
3. Schwartz SH. Anomalies of color vision. In: Visual
perception: a clinical orientation. 3rd edition, McGraw-Hill
medical publishing Division; 2004:147-9.
4. Dain SJ. Clinical color vision tests. Clin Exp Optom.
2004;87:276-93.
5. Dain SJ, Gray S, Tran L. Colorimetric analysis and performance
assessment of the Hahn new pseudoisochromatic color
vision test. Color Res Application. 1997; 23: 69-77.
6. Dian SJ. Evaluation of color vision testing made easy.
Normal and defective color vision, Oxford England: Oxford
University Press; 2003:347-53.
7. Paulson HM. Comparison of color vision tests used in the
armed forces. In Judd DB, editor. Color vision. Washington,
DC: National Academy of Science1973:34-64.
8. Farnsworth D. New Farnsworth Dichotomous test for color
blindness, New York: Psychological corporation; 1947.
9. Linksz A. the Farnsworth Panel D 015 test. Am J ophthalmolol.
1966;62:27-37.
10. Birch J. Pass rate for the Farnsworth D-15 color vision test.
Ophthal Physiol Opt. 2008; 28:259-64.
11. Formankiewicz M. Assessment of color vision-color vision
part 2. Continuing education and training. 2009:28-35.
(Retrieved on 4th August 2015 from http://www.optometry.
co.uk/uploads/articles/CET231009.pdf)
12. Bailey JE. Color vision. In: Eskridge BJ, Amos JF, Barlett JD.
Clinical procedure in optometry. Philadelphia: JB Lippincott
Company 1991:99-120.
13. Pokorny J, Smith VC, Verriest G, et al. Congenital and
acquired color vision defects. New York. Grune and Stratton
1979:83-135.
14. Shrestha RK, Joshi MR, Shakya S, Ghising R. Color vision
defects in school going children. JNMA J Nepal Med
Assoc. 2010;50:264-6.
15. Mahajan OP, Gogna RS. Study of color blindness in school
children. Indian J Physiol Pharmacol. 1977;21:59-62.
16. Zein ZA, Gene frequency and type of color blindness in
Ethiopians. Ethiop Med J. 1990; 28:73-5.
17. Naresh S. Study of color blindness in Jat Sikhs. Indian J
Physiol Pharmacol. 1995; 39:127-30.
18. Modarres M, Mirsamadi M, Peyman GA. Prevalence of
congenital color deficiency in secondary school students in
Tehran. Int Ophthalmol. 1996-97; 20: 221-2.
19. Kim HB, Lee SY, Choe JK, Lee JH, Ahu BH. The incidence of
congenital color deficiency among Koreans. J Korean Med
Sci. 1989;4:117-20.
20. Emery AEH. Elements of Medical Genetics. 6th ed. Churchill
Livingstone Edinburg;1983
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