Resumen de Color perception and contrast sensitivity of either UVlight fi ltering or blue-light fi ltering intraocular lenses

Evangelia Stangogiannis Druya, C. Stangogiannis-Druya

• PURPOSE: To evaluate contrast sensitivity and color perception after implantation of either UV-light fi ltering or blue-light fi ltering with a yellow chromophore intraocular lenses (IOL).

  SETTING: Laserlens. Ophthalmology Institute. Ioannina-Greece.

  METHODS: A prospective, longitudinal, comparative and interventional study including 200 eyes of 100 patients undergoing phacoemulsifi cation. The first group included 150 eyes from 75 patients implanted with blue-light fi ltering with yellow chromophore IOLs, while the second group included 50 eyes from 25 patients implanted with UV-light fi ltering IOLs.

  All patients underwent a complete ophthalmological examination and complementary studies of contrast sensitivity and chromatic perception.

  RESULTS: The desaturated Farnsworth-Munsell D-15 test (FM-15) showed higher mean accuracy in the postoperative period (ANOVA p = 0.028). The confusion index, determined by the degree of color loss, demonstrated a signifi cant diff erence with implantation of IOLs (SN6AD1 and SN60WF), in both saturated (ANOVA p = 0.017) and desaturated colors (ANOVA p = 0.009). The strong polar orientation of the dyschromatopsia was evaluated with the selectivity index (S-index), noting that the desaturated colors showed a signifi cant variation in both groups (ANOVA p = 0.048), unlike the saturated colors (ANOVA p = 0.098). The IOL did not determine a statistically signifi cant change (S-index) in either saturated (ANOVA p = 0.266) or desaturated colors (ANOVA p = 0.156). Contrast sensitivity was higher in patients treated with blue-light fi ltering and yellow chromophore (SN60WF, SN60AT and SN6AD1).

  CONCLUSION: Blue-light fi ltering with 0.04% yellow chromophore IOLs improves contrast sensitivity in both photopic and mesopic conditions, and also improves the quality of color perception.