A novel standardized test system to evaluate dynamic visual acuity post trifocal or monofocal intraocular lens implantation: a multicenter study.

OBJECTIVES: To compare the dynamic visual acuity (DVA) following implantation of trifocal with monofocal intraocular lenses (IOL) and using a novel test system. METHODS: The present research was a retrospective, multicenter clinical study. Two hundred and ten eyes of 149 patients that underwent cataract phacoemulsification and IOL implantation were enrolled. One hundred and ten eyes of patients received trifocal (AT LISA tri839MP, Carl Zeiss Meditec, Germany) and 100 eyes received monofocal (Tecnis ZCB00, Abbott, United States) lenses and were evaluated 3 months after implantation. Outcome measures included monocular uncorrected distance (UDVA), intermediate (UIVA) and near (UNVA) visual acuity and best corrected distance visual acuity (BCDVA; logMAR units); contrast sensitivity under photopic, mesopic, with glare conditions; and dynamic visual acuity using a self-developed system. RESULTS: There was no statistically significant difference in baseline characteristics between groups. Monocular UDVA, UIVA, and UNVA were significantly better (all p < 0.001) in the trifocal IOL group, but not BCDVA. The trifocal IOL group showed better contrast sensitivity under photopic, mesopic, with or without glare conditions (p < 0.05) and statistically significantly better dynamic vision at 15, 30, 60, and 90 degrees per second (dps) compared with the monofocal group (all p < 0.001). The strength of positive association only between UIVA and dynamic visual acuity increased as the velocity increased, but not UDVA or UNVA. CONCLUSIONS: Diffractive trifocal IOL provides better postoperative full range vision acuity, contrast sensitivity, and dynamic vision compared with monofocal IOLs. And intermediate visual acuity is increasingly associated with DVA as the velocity increasing.

Efficacy of Femtosecond Laser-Assisted Phacoemulsification for Cataract Patients and its Influence on Serum Levels of Inflammatory Factors.

OBJECTIVE: To investigate effect of femtosecond laser-assisted phacoemulsification in treating cataract patients, and to analyse its influence on serum inflammatory factors IL-6, IL-1ß, TNF-α . STUDY DESIGN: An analytical, descriptive study. PLACE AND DURATION OF STUDY: The Ophthalmologic Center, Rehabilitation Center Hospital of Gansu, China, from January 2016 to September 2017. METHODOLOGY: A total of 94 eyes were randomly divided into control group (47 cases) and observation group (47 cases). Control group was treated with traditional phacoemulsification. The observation group was added with femtosecond laser based on the treatment of the control group. Clinical efficacy of two groups was compared. RESULTS: Surgery time of the observation group was longer than that of the control group (p<0.001). Effective phacoemulsification time, cumulative dissipated energy, and liquid flow of the observation group were all less than those of the control group (all p<0.001). One day after surgery, aqueous flare and rate of corneal endothelium loss in the observation group were less than those of the control group (both p<0.001). Seven days after surgery, serum levels of IL-6, IL-1 and TNF- in the observation group were lower than those of the control group (all p<0.001). CONCLUSION: Femtosecond laser-assisted phacoemulsification has better clinical effect in treating cataract, and can reduce the energy and time cost in the phacoemulsification, decrease the serum levels of inflammatory factors and cause less postoperative complications. But it takes longer operation time and relatively higher treatment cost.