The prevalence of color vision deficiency in the northeast of Iran

Hashemi, Hassan; Khabazkhoob, Mehdi; Pakzad, Reza; Yekta, Abbasali; Heravian, Javad; Nabovati, Payam; Ostadimoghaddam, Hadi

doi:10.1016/j.joco.2017.05.005

Cited by 15 publications

(23 citation statements)

References 30 publications

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“…Additional future work includes investigating the effects of other variations in colour perception. Even among those with regular colour vision, variations in colour perception exist [22], including demographical trends [21,28]. Moreover, monochromacy was not discussed in this work because of its rarity [24] but likely has an even more pronounced effect on colour discriminability than the deficiencies investigated here.…”

Section: Discussionmentioning

confidence: 99%

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Citizen science with colour blindness: A case study on the Forel-Ule scale

2021

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Many citizen science projects depend on colour vision. Examples include classification of soil or water types and biological monitoring. However, up to 1 in 11 participants are colour blind. We simulate the impact of various forms of colour blindness on measurements with the Forel-Ule scale, which is used to measure water colour by eye with a 21-colour scale. Colour blindness decreases the median discriminability between Forel-Ule colours by up to 33% and makes several colour pairs essentially indistinguishable. This reduces the precision and accuracy of citizen science data and the motivation of participants. These issues can be addressed by including uncertainty estimates in data entry forms and discussing colour blindness in training materials. These conclusions and recommendations apply to colour-based citizen science in general, including other classification and monitoring activities. Being inclusive of the colour blind increases both the social and scientific impact of citizen science.

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Section: Discussionmentioning

confidence: 99%

“…Protan and deutan are the most common, affecting for example up to 9% of men and 0.6% of women in Europe, as well as 7% of men and 2% of women in China [21]. The prevalence of tritan in the West is on the order of 1:10 000 [25], though higher prevalences have been reported in other locations [28].…”

Section: Introductionmentioning

confidence: 99%

Citizen science with colour blindness: A case study on the Forel-Ule scale

2021

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“…20 Similarly, a study carried out in Iran reported that prevalence of colour vision deficiency was higher in males than females. 21 Stereopsis, the ability to visualise objects in three dimensions, increases rapidly from the age of 4-7 years. 22 Severe visual impairment in children worsens their stereo acuity more than mild visual impairment.…”

Section: Aimmentioning

confidence: 99%

Profile of vision function amongst learners with low vision attending inclusive schools in Kakamega County, Kenya

Ashioya

Clarke-Farr

2021

African Vision and Eye Health

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Background: The quality of vision function of low vision (LV) children determines their ease and success in performing activities of daily living including academic activities undertaken whilst at school.Aim: The aim of this study was to determine the vision function of LV learners attending inclusive schools in Kakamega County, Kenya.Setting: This study was designed at public primary inclusive schools in Kakamega County, with LV placements by the County Educational Assessment and Resource Center.Methods: This was a school-based cross-sectional study. A census survey identified 21 LV learners, who met the World Health Organization (WHO) classification of LV and had been assessed and placed in 11 public primary inclusive schools in Kakamega County. Participants underwent standard LV assessment tests. Data were entered into Statistical Package for the Social Sciences (SPSS) version 25 software and analysed using descriptive and inferential statistics. Data were summarised and presented using tables, figures and percentages.Results: Out of the 21 LV learners who were selected, 19 (90.5%) were assessed. The best recorded visual acuity (VA) was 0.33 decimal notation at far and 0.02 and 0.01 in the right eye and the left eye, respectively, at near. The vast majority, 94.7%, had reduction in stereopsis, whilst 42.1% had defects in colour vision, 20.0% reduced contrast sensitivity (CS) and 15.8% had visual field impairment within the central 20 degrees.Conclusion: There is an overall decrease in vision function amongst LV learners attending inclusive schools in Kakamega County. The most affected parts of vision function are VA and stereopsis.

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“…Color Vision Deficiency is found in 4.7% of Irani population. 3 In United Kingdom the prevalence is 6.7%, 8.5% in Mediterranean Croatia and 8.9% in Croatia. 3 The rate of dichromacy was higher in Mediterranean Croatia (2.40%), while the rate of anomalous trichromacy was greater in inland Croatia (6.93%).…”

Section: Introductionmentioning

confidence: 99%

“…3 In United Kingdom the prevalence is 6.7%, 8.5% in Mediterranean Croatia and 8.9% in Croatia. 3 The rate of dichromacy was higher in Mediterranean Croatia (2.40%), while the rate of anomalous trichromacy was greater in inland Croatia (6.93%). 4 A higher number of color vision deficiency is found in Australia and Turkey which is 7.4% and 7.3% respectively.…”

Section: Introductionmentioning

confidence: 99%

Color Vision Defects among Textile Mill Workers in Lahore

Omair¹,

Imtiaz²,

Iqbal³

2020

pak J Ophthalmol

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Purpose: To find out the color vision defects among textile mill workers in Lahore. Study Design: Descriptive cross sectional study. Place and Duration of Study: University of Lahore from June 2019 to December 2019. Methods: Study was done at different textile mills in Lahore, Pakistan. Self-designed proforma was used to record data including age, gender, occupation, any medication or surgery. The workers with best corrected visual acuity of 6/6 and refractive error less than 3.00 D of sphere or astigmatism less than 1 D of cylinder with no history of ocular surgeries were included in the study. Color vision was assessed using Ishihara Isochromatic color plates. Examination of the anterior segment and posterior segment was done by using slit lamp Biomicroscopy and 90 D of condensing lens.Data was entered and analyzed using the SPSS version 22. Results: During this study 1,250 textile mill workers fulfilled the inclusion criteria. Six hundred fifty were males and 600 were females. Only 10 workers were suffering from color vision deficiency, which was 0.8% of the total sample size. All of the color vision deficiency patients were male of different age group. Conclusion: It has been concluded that although textile industry is based on colors, there is no proper color vision examination in our textile sector. Colour vision deficiency awareness should be increased so that everyone in the community is well aware of it. The test of color vision must be made compulsory in pre-employment examination at public and private sector at every Level.

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The prevalence of color vision deficiency in the northeast of Iran

Cited by 15 publications

References 30 publications

Citizen science with colour blindness: A case study on the Forel-Ule scale

Citizen science with colour blindness: A case study on the Forel-Ule scale

Profile of vision function amongst learners with low vision attending inclusive schools in Kakamega County, Kenya

Color Vision Defects among Textile Mill Workers in Lahore

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