The goal of this prospective cohort study is to compare visual quality after cataract surgery in patients implanted with a new domestic trifocal intraocular lens (D615L) versus the Zeiss AT LISA tri 839MP. The main question it aims to answer is: Is the uncorrected distance, intermediate, and near visual acuity achieved with D615L non-inferior or superior to that achieved with the Zeiss 839MP? Participants diagnosed with age-related cataract will undergo phacoemulsification and receive one of the two intraocular lenses. They will attend follow-up visits where uncorrected visual acuity, defocus curves, and the VF-14 questionnaire will be assessed over a follow-up period of at least 6 months.

Inclusion Criteria:

• diagnosed age-related cataract;
• preoperative corneal astigmatism <1.0 D;
• endothelial cell count >2000/mm²;
• signed informed consent and ability to complete 6-month follow-up

Exclusion Criteria:

• prior corneal refractive, glaucoma or vitreoretinal surgery;
• intraoperative posterior capsule rupture, zonular dehiscence or vitreous loss;
• corneal pathology, macular edema or optic neuropathy affecting visual assessment;
• active ocular inflammation, glaucoma, maculopathy or diabetic retinopathy;
• uncontrolled systemic disease such as diabetes or autoimmune disorders.

patients with age-related cataract