Examination of colour vision deficiency in different types retinitis pigmentosa

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Abstract

Purpose

Investigation of the colour vision deficiency in different typees of retinitis pigmentosa (RP): autosomal dominant, autosomal recessive, X-linked recessive, and isolated cases.

Methods

Colour vision investigation was conducted on 42 patients (18 women, 24 men) with RP using the Farnsworth 28 HUE-test, anomaloscope –IF-2 Tomay, flicker threshold test, standard pseudoisochromatic table and Tritan Lantonie album. The age of the patients varied from 5 to 68 years (mean 39 ± 17, SD),

Results

In 73,3 % of patients with RP we established acquired colour vision deficiency (dyschromatopsy). Among the patients with aquired colour vision deficiency we found out using the above-mentioned tests that 67,8% were with tritanopy, 19,3% were with manifested deuteranomaly and 12,9 % were with protanomaly. The type of dyschromatopsy does not show any relation to the age and visual aquity of patients. When no foveal lesion was apparent in patients with visual acuity better than 20/40, patients with autosomal dominant disease showed superior performance on color vision testing when compared to autosomal recessive, X-linked recessive, and isolated cases. The Farnsworth 28 HUE test was more sensitive in detecting poor color vision performance than the anomaloscope –IF-2 Tomay.

Conclusion

We established a great percentile of patients with RP suffer from colour vision deficiency. Our study reveals that colour vision investigation has an important role in PR diagnosis.

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