Abstract: Objective To compare the differences of contrast vision and color vision after implanting yellow intraocular lens (IOL) with aspheric photochromic IOL in cataract surgery in children. Design Retrospective case series. Participants 43 cases (56 eyes) with cataract who were treated by phacoemulsification and IOL implantation. Methods According to the different IOL, patients were divided into two groups: 26 eyes in the yellow IOL group, 30 eyes in the aspheric photochromic IOL group. All eyes were reviewed after 3 months postoperatively. Visual acuity, intraocular pressure (IOP), slit lamp examination, fundus, contrast vision and color vision were examed and compared in the two groups. Main Outcome Measures visual acuity, contrast vision and color vision. Results The postoperative uncorrected visual acuity and corrected visual acuity had no significant difference between two groups. The aspheric photochromic IOL group had the better contrast vision (0.21±0.14) than yellow IOL group(0.39±0.11) in 40 lux, 5% contrast conditions (P=0.001). The total error scores of FM 100 test were not significantly different between the two groups in the photopic conditions (outdoor sunshine and indoor 1000 lux), but the total error scores of the yellow IOL group(48.51±16.73) was significantly higher than that of the aspheric photochromic IOL group(31.25±11.39) in the mesopic conditions (40 lux) (P=0.003). Conclusion There were no significant difference of contrast vision between the yellow IOL and the aspheric photochromic IOL under the photopic conditions, and the aspheric photochromic IOL can provide the better contrast vision and color vision under the mesopic conditions.

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