Abstract:

 Objective To analyze and compare the differences of contrast vision and color vision of three kinds of intraocular lens (IOL) in different illumination conditions in cataract patients. Design Retrospective case series. Participants 300 cases with phacoemulsification and IOL implantation. Methods We chronologically collected 300 patients undergone cataract extraction and implanted with different IOL, 100 eyes in group 1 (implanted with aspheric photochromic IOL), 100 eyes in group 2 (implanted with aspheric yellow IOL) and 100 eyes in group 3 (implanted with spheric photochromic IOL). All eyes were reviewed at 3 months postoperatively. Visual acuity, intraocular pressure (IOP), slit lamp examination, fundus, contrast vision and color vision were recorded. Main Outcome Measures Visual acuity, contrast vision and color vision. Results There is no significant difference in postoperative uncorrected and corrected visual acuity among the three groups (P=0.935, P=0.681). The aspheric photochromic IOL group had better contrast vision than the other two groups at 30 lux, 5% contrast conditions (LogMAR 0.301 ± 0.17 vs LogMAR 0.472 ± 0.22 and 0.327 ± 0.23, both P<0.001). The total error scores of FM 100 test were not significantly different among the three groups at 400 lux conditions (P=0.163), but the total error scores of the aspheric photochromic IOL group was significantly lower than that the other two groups (36.45±14.89 vs 46.72 ±20.67 and 38.31±15.82) at the mesopic conditions (30 lux) (both P<0.001). Conclusion There was no significant difference of contrast vision among eyes implanted with aspheric photochromic IOL, aspheric yellow IOL and spheric photochromic IOL under photopic conditions, but the aspheric photochromic IOL group had better contrast vision and color vision under mesopic conditions. (Ophthalmol CHN, 2019, 28: 104-108)

Key words: aspheric photochromic intraocular lens, contrast vision, color vision