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. 2021 Oct;259(10):2961-2966.
doi: 10.1007/s00417-021-05171-7. Epub 2021 Apr 12.

Evaluation of acquired color vision deficiency in retinal vein occlusion using the Rabin cone contrast test

Riko Matsumoto  1 , Yoshitsugu Saishin  2 , Masahito Ohji  1
Affiliations

Evaluation of acquired color vision deficiency in retinal vein occlusion using the Rabin cone contrast test

Riko Matsumoto et al. Graefes Arch Clin Exp Ophthalmol. 2021 Oct.

Abstract

Purpose: To investigate acquired color vision deficiency (CVD) using the Rabin cone contrast test (RCCT) in patients with retinal vein occlusion (RVO).

Methods: We retrospectively evaluated 39 patients with macular edema due to RVO who were treated with intravitreal injections of anti-VEGF agents and demonstrated improvement of best-corrected visual acuity to 20/20 Snellen VA or better. The acquired CVD was evaluated by the RCCT and standard pseudo-isochromatic plates-part 2 (SPP-2).

Results: Mean L, M, and S color contrast test (CCT) scores were significantly lower in RVO eyes than in the fellow eyes (L CCTs, 70.0 ± 13.3 vs. 90.0 ± 8.0, respectively, P < 0.01; M CCTs, 85.0 ± 16.6 vs. 95.0 ± 5.7, respectively, P < 0.01; S CCTs, 80.0 ± 21.5 vs. 95.0 ± 7.1, respectively, P < 0.01). Acquired CVD was diagnosed in 25 eyes of 39 patients by the RCCT and in 15 eyes of 39 patients by SPP-2. The RCCT was performed on two different days in 21 patients. It revealed acquired CVD in 17 eyes on the first day and in 10 eyes on the second day. Acquired CVD was improved in 9 eyes, unchanged in 8 eyes, and worsened in 2 eyes.

Conclusions: The RCCT revealed eyes with RVO had acquired CVD. Acquired CVD caused by RVO can be improved further in some cases even after recovery of vision to 20/20. The RCCT may be able to quantitatively diagnose acquired CVD status.

Keywords: Acquired color vision deficiency; Rabin cone contrast test; Retinal vein occlusion; Standard pseudo-isochromatic plates part 2.

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