Are X-Chrome Lenses An Occupational Succor for the Colour Vision Defectives?

Punita k Sodhi, Shraddha Saraf, Jugal Kishore


Purpose: To understand total visual experience of a colour vision defective, this study evaluated responses with X-Chrome lenses on three most prevalent colour vision testing techniques.

Methods: The colour vision responses were assessed at baseline and after wearing X-Chrom lenses on Ishihara’s plates, Edridge Green Lantern and anomaloscope of 51 defective males in the age range of 13-41 years in a non-randomized intervention study.

Results: While red and orange lenses gave better results on Ishihara’s plates in terms of SS increase in mean number of plates read (p=0.03) and on anomaloscope by shift of Aq values towards normal range (not SS, p=0.44) but green lenses increased mean number of colours seen on Edridge Green Lantern (p=0.03).

Conclusions: The red and orange lenses absorb shorter wavelengths of light facilitating red-green blinds to improve on techniques testing red/green defect i.e. Ishihara’s and anomaloscope. However, green lenses may have improved hue discrimination on Edridge Green Lantern.


X Chrom lens, Colour vision defectives, Colour vision defect- treatment, Ishihara's plates, Edridge Green Lantern, Anomaloscope, Absorption spectrum of X Chrom lens

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Cole BL. Assessment of inherited colour vision defects in clinical practice. Clin Exp Optom. 2007; 90:157-75.

Birch J. Diagnosis of Defective colour vision. Oxford: Butterworth-Heinemann, 1998.

Steward SM, Cole BL. What do colour vision defectives say about everyday tasks? Optom Vis Sci. 1989; 66:288-95.

Pickford RW, Cobb SR. Personality and colour vision deficiencies. Colour Vision Deficiencies. II Int Symp, Edinburgh 1973. Mod Prob Ophthalmol. 1974; 13:225-30.

Farnsworth D. Investigation on corrective training of colour blindness. Sight Sav Rev. 1947;17:194-200.

Schmidt I. Visual aids for the correction of red/green colour deficiencies. Can J Optom. 1976;38:38-47.

Fletcher R J. The prescription of filters for daltonism. Ophthal Optn. 1980;20:334-40.

Seebeck A. Uber den bei manchen Personene vorkommenden Mangel an Farbensian. Annin Phys. 1837;42:177-233.

Kernell D. A simple and inexpensive method for helping red/green blind persons to identify colours. Rev Sens disability. September 1974;17:9

Zeltzer HI: The X-Chrom Manual. X-Chrom Corp. Int Hq, 6 Beacon St, Boston MA, 1975.

Taylor SP. The X-chrom lens- A case study. Ophthal Physiol.Opt. 1982;2(2):165-70.

Linksz, A. A colour vision test in clinical practice. Trans Am Acad Ophthalmol Otolaryngol.1971; 75:1078-90.

Pokorny, J., Collins, B., Howett, G., Lakowski, H., Lewis, M., Moreland, J., Paulson, H. and Smith, V., Procedures for Testing Color Vision: Report of Working Group 41, National Academy Press, Washington D.C., 1981.

Roth HL, Lora AN, Heilman KM (2002). "Effects of monocular viewing and eye dominance on spatial attention". Brain 125 (Pt 9): 2023–35.

Siegel IM. The X-chrom lens: On seeing red. Surv Ophthalmol. 1981;25:312-24.

Polizzotto L. Dichoptic color perception and the X-Chrom lens. Am J Optom & Physiol Optics. 1981; 58 (12):1180-6.

Matsumoto ER, Johnson CA, Post RB. Effect of X-Chrome lens wear on chromatic discrimination and stereopsis in color-deficient observers. Am J Optom & Physiol Optics. 1983; 60(4):297-302.

Kassar BS, Dresner SC, May JG, Marx MS. Evaluation of the X-Chrome lens and color deficiency. CLAO, 1984;10 (1):100-3.

Ditmars DL, Keener RJ: A contact lens for the treatment of color vision defects. Military Med, 1976;141:319-22.

La Bissoniere P. The X-Chrom lens. Int. Contact Lens Clinic I. 1974;4:48-55.

Diaconu V, Sullivan D, Bouchard JF, Vucea V. Discriminating colors through a red filter by protanopes and colour normal. Ophthalmic Physiol Opt. 2010 Jan; 30(1): 66-75.


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